diff --git a/crates/nu-cli/src/completion/engine.rs b/crates/nu-cli/src/completion/engine.rs
index 5000abc333..f99a6c1fab 100644
--- a/crates/nu-cli/src/completion/engine.rs
+++ b/crates/nu-cli/src/completion/engine.rs
@@ -25,7 +25,7 @@ impl<'s> Flatten<'s> {
     fn expression(&self, e: &SpannedExpression) -> Vec<CompletionLocation> {
         match &e.expr {
             Expression::Block(block) => self.completion_locations(block),
-            Expression::Invocation(block) => self.completion_locations(block),
+            Expression::Subexpression(block) => self.completion_locations(block),
             Expression::List(exprs) => exprs.iter().flat_map(|v| self.expression(v)).collect(),
             Expression::Table(headers, cells) => headers
                 .iter()
diff --git a/crates/nu-cli/src/types/deduction.rs b/crates/nu-cli/src/types/deduction.rs
index a5ad92c5eb..93feb1ce08 100644
--- a/crates/nu-cli/src/types/deduction.rs
+++ b/crates/nu-cli/src/types/deduction.rs
@@ -302,7 +302,7 @@ fn get_shape_of_expr(expr: &SpannedExpression) -> Option<SyntaxShape> {
         Expression::ExternalCommand(_) => Some(SyntaxShape::String),
         Expression::Table(_, _) => Some(SyntaxShape::Table),
         Expression::Command => Some(SyntaxShape::String),
-        Expression::Invocation(_) => Some(SyntaxShape::Block),
+        Expression::Subexpression(_) => Some(SyntaxShape::Block),
         Expression::Garbage => unreachable!("Should have failed at parsing stage"),
     }
 }
@@ -544,7 +544,7 @@ impl VarSyntaxShapeDeductor {
                 match &path.head.expr {
                     //PathMember can't be var yet (?)
                     //TODO Iterate over path parts and find var when implemented
-                    Expression::Invocation(b) => self.infer_shape(&b, scope)?,
+                    Expression::Subexpression(b) => self.infer_shape(&b, scope)?,
                     Expression::Variable(var_name, span) => {
                         self.checked_insert(
                             &VarUsage::new(var_name, span),
@@ -588,8 +588,8 @@ impl VarSyntaxShapeDeductor {
                     self.infer_shapes_in_expr((pipeline_idx, pipeline), expr, scope)?;
                 }
             }
-            Expression::Invocation(invoc) => {
-                trace!("Inferring vars in invocation: {:?}", invoc);
+            Expression::Subexpression(invoc) => {
+                trace!("Inferring vars in subexpression: {:?}", invoc);
                 self.infer_shape(invoc, scope)?;
             }
             Expression::Table(header, _rows) => {
@@ -794,7 +794,7 @@ impl VarSyntaxShapeDeductor {
                         | Expression::FilePath(_)
                         | Expression::ExternalCommand(_)
                         | Expression::Command
-                        | Expression::Invocation(_)
+                        | Expression::Subexpression(_)
                         | Expression::Boolean(_)
                         | Expression::Garbage => {
                             unreachable!("Parser should have rejected code. In only applicable with rhs of type List")
diff --git a/crates/nu-command/src/commands/any.rs b/crates/nu-command/src/commands/any.rs
index d2ce5a99bd..0e435cf2c2 100644
--- a/crates/nu-command/src/commands/any.rs
+++ b/crates/nu-command/src/commands/any.rs
@@ -89,7 +89,7 @@ fn any(args: CommandArgs) -> Result<OutputStream, ShellError> {
         UntaggedValue::boolean(false).into_value(&tag),
     ));
 
-    // Variables in nu are immutable. Having the same variable accross invocations
+    // Variables in nu are immutable. Having the same variable across invocations
     // of evaluate_baseline_expr does not mutate the variables and thus each
     // invocations are independent of each other!
     scope.enter_scope();
diff --git a/crates/nu-command/tests/commands/insert.rs b/crates/nu-command/tests/commands/insert.rs
index eb02d11a6a..4d162de95d 100644
--- a/crates/nu-command/tests/commands/insert.rs
+++ b/crates/nu-command/tests/commands/insert.rs
@@ -30,7 +30,7 @@ fn sets_the_column_from_a_block_full_stream_output() {
 }
 
 #[test]
-fn sets_the_column_from_an_invocation() {
+fn sets_the_column_from_a_subexpression() {
     let actual = nu!(
         cwd: "tests/fixtures/formats", pipeline(
         r#"
diff --git a/crates/nu-command/tests/commands/update.rs b/crates/nu-command/tests/commands/update.rs
index c1273930d9..5506fb4880 100644
--- a/crates/nu-command/tests/commands/update.rs
+++ b/crates/nu-command/tests/commands/update.rs
@@ -45,7 +45,7 @@ fn sets_the_column_from_a_block_full_stream_output() {
 }
 
 #[test]
-fn sets_the_column_from_an_invocation() {
+fn sets_the_column_from_a_subexpression() {
     let actual = nu!(
         cwd: "tests/fixtures/formats", pipeline(
         r#"
diff --git a/crates/nu-engine/src/evaluate/evaluator.rs b/crates/nu-engine/src/evaluate/evaluator.rs
index 1231c1a714..328a3d99f4 100644
--- a/crates/nu-engine/src/evaluate/evaluator.rs
+++ b/crates/nu-engine/src/evaluate/evaluator.rs
@@ -37,7 +37,7 @@ pub fn evaluate_baseline_expr(
         }
         Expression::Variable(var, s) => evaluate_reference(&var, ctx, *s),
         Expression::Command => unimplemented!(),
-        Expression::Invocation(block) => evaluate_invocation(block, ctx),
+        Expression::Subexpression(block) => evaluate_subexpression(block, ctx),
         Expression::ExternalCommand(_) => unimplemented!(),
         Expression::Binary(binary) => {
             // TODO: If we want to add short-circuiting, we'll need to move these down
@@ -277,7 +277,10 @@ fn evaluate_reference(
     }
 }
 
-fn evaluate_invocation(block: &hir::Block, ctx: &EvaluationContext) -> Result<Value, ShellError> {
+fn evaluate_subexpression(
+    block: &hir::Block,
+    ctx: &EvaluationContext,
+) -> Result<Value, ShellError> {
     // FIXME: we should use a real context here
     let input = match ctx.scope.get_var("$it") {
         Some(it) => InputStream::one(it),
diff --git a/crates/nu-engine/tests/evaluate/mod.rs b/crates/nu-engine/tests/evaluate/mod.rs
index 298581ade5..26045df067 100644
--- a/crates/nu-engine/tests/evaluate/mod.rs
+++ b/crates/nu-engine/tests/evaluate/mod.rs
@@ -1,3 +1,3 @@
-mod invocation;
 mod operator;
+mod subexpression;
 mod variables;
diff --git a/crates/nu-engine/tests/evaluate/invocation.rs b/crates/nu-engine/tests/evaluate/subexpression.rs
similarity index 93%
rename from crates/nu-engine/tests/evaluate/invocation.rs
rename to crates/nu-engine/tests/evaluate/subexpression.rs
index d606cc187e..20aa7c3ab1 100644
--- a/crates/nu-engine/tests/evaluate/invocation.rs
+++ b/crates/nu-engine/tests/evaluate/subexpression.rs
@@ -1,7 +1,7 @@
 use nu_test_support::nu;
 
 #[test]
-fn test_parse_invocation_with_range() {
+fn test_parse_subexpression_with_range() {
     let actual = nu!(
         cwd: ".",
         r#"
diff --git a/crates/nu-parser/src/parse.rs b/crates/nu-parser/src/parse.rs
index 3f7d1967bc..218fe1b338 100644
--- a/crates/nu-parser/src/parse.rs
+++ b/crates/nu-parser/src/parse.rs
@@ -129,7 +129,7 @@ pub fn parse_full_column_path(
 
             if head.is_none() && current_part.starts_with('(') && current_part.ends_with(')') {
                 let (invoc, err) =
-                    parse_invocation(&current_part.clone().spanned(part_span), scope);
+                    parse_subexpression(&current_part.clone().spanned(part_span), scope);
                 if error.is_none() {
                     error = err;
                 }
@@ -162,7 +162,7 @@ pub fn parse_full_column_path(
 
         if head.is_none() {
             if current_part.starts_with('(') && current_part.ends_with(')') {
-                let (invoc, err) = parse_invocation(&current_part.spanned(part_span), scope);
+                let (invoc, err) = parse_subexpression(&current_part.spanned(part_span), scope);
                 if error.is_none() {
                     error = err;
                 }
@@ -470,13 +470,12 @@ fn parse_filesize(lite_arg: &Spanned<String>) -> (SpannedExpression, Option<Pars
     )
 }
 
-fn parse_invocation(
+fn parse_subexpression(
     lite_arg: &Spanned<String>,
     scope: &dyn ParserScope,
 ) -> (SpannedExpression, Option<ParseError>) {
     let mut error = None;
 
-    // We have a command invocation
     let string: String = lite_arg
         .item
         .chars()
@@ -502,7 +501,7 @@ fn parse_invocation(
     scope.exit_scope();
 
     (
-        SpannedExpression::new(Expression::Invocation(classified_block), lite_arg.span),
+        SpannedExpression::new(Expression::Subexpression(classified_block), lite_arg.span),
         error,
     )
 }
@@ -526,7 +525,7 @@ fn parse_variable(
 }
 /// Parses the given lite_arg starting with dollar returning
 /// a expression starting with $
-/// Currently either Variable, Invocation, FullColumnPath
+/// Currently either Variable, String interpolation, FullColumnPath
 fn parse_dollar_expr(
     lite_arg: &Spanned<String>,
     scope: &dyn ParserScope,
@@ -676,7 +675,7 @@ fn parse_interpolated_string(
                 match result {
                     (classified_block, None) => {
                         output.push(SpannedExpression {
-                            expr: Expression::Invocation(classified_block),
+                            expr: Expression::Subexpression(classified_block),
                             span: c.span,
                         });
                     }
@@ -709,8 +708,8 @@ fn parse_interpolated_string(
     let group = Group::new(pipelines, lite_arg.span);
 
     let call = SpannedExpression {
-        expr: Expression::Invocation(Arc::new(Block::new(
-            Signature::new("<invocation>"),
+        expr: Expression::Subexpression(Arc::new(Block::new(
+            Signature::new("<subexpression>"),
             vec![group],
             IndexMap::new(),
             lite_arg.span,
@@ -729,7 +728,7 @@ fn parse_external_arg(
     if lite_arg.item.starts_with('$') {
         parse_dollar_expr(&lite_arg, scope)
     } else if lite_arg.item.starts_with('(') {
-        parse_invocation(&lite_arg, scope)
+        parse_subexpression(&lite_arg, scope)
     } else {
         (
             SpannedExpression::new(Expression::string(lite_arg.item.clone()), lite_arg.span),
diff --git a/crates/nu-parser/src/shapes.rs b/crates/nu-parser/src/shapes.rs
index 0065c1afde..4760646c47 100644
--- a/crates/nu-parser/src/shapes.rs
+++ b/crates/nu-parser/src/shapes.rs
@@ -6,7 +6,7 @@ use nu_source::{Spanned, SpannedItem};
 pub fn expression_to_flat_shape(e: &SpannedExpression) -> Vec<Spanned<FlatShape>> {
     match &e.expr {
         Expression::Block(exprs) => shapes(exprs),
-        Expression::Invocation(exprs) => shapes(exprs),
+        Expression::Subexpression(exprs) => shapes(exprs),
         Expression::FilePath(_) => vec![FlatShape::Path.spanned(e.span)],
         Expression::Garbage => vec![FlatShape::Garbage.spanned(e.span)],
         Expression::List(exprs) => {
diff --git a/crates/nu-protocol/src/hir.rs b/crates/nu-protocol/src/hir.rs
index 7ebf07f2b0..1e3cc061e9 100644
--- a/crates/nu-protocol/src/hir.rs
+++ b/crates/nu-protocol/src/hir.rs
@@ -772,7 +772,7 @@ impl PrettyDebugWithSource for SpannedExpression {
                 Expression::Binary(binary) => binary.pretty_debug(source),
                 Expression::Range(range) => range.pretty_debug(source),
                 Expression::Block(_) => DbgDocBldr::opaque("block"),
-                Expression::Invocation(_) => DbgDocBldr::opaque("invocation"),
+                Expression::Subexpression(_) => DbgDocBldr::opaque("subexpression"),
                 Expression::Garbage => DbgDocBldr::opaque("garbage"),
                 Expression::List(list) => DbgDocBldr::delimit(
                     "[",
@@ -831,7 +831,7 @@ impl PrettyDebugWithSource for SpannedExpression {
             Expression::Binary(binary) => binary.pretty_debug(source),
             Expression::Range(range) => range.pretty_debug(source),
             Expression::Block(_) => DbgDocBldr::opaque("block"),
-            Expression::Invocation(_) => DbgDocBldr::opaque("invocation"),
+            Expression::Subexpression(_) => DbgDocBldr::opaque("subexpression"),
             Expression::Garbage => DbgDocBldr::opaque("garbage"),
             Expression::List(list) => DbgDocBldr::delimit(
                 "[",
@@ -1082,7 +1082,7 @@ pub enum Expression {
     FilePath(PathBuf),
     ExternalCommand(ExternalStringCommand),
     Command,
-    Invocation(Arc<hir::Block>),
+    Subexpression(Arc<hir::Block>),
 
     Boolean(bool),
 
@@ -1106,7 +1106,7 @@ impl ShellTypeName for Expression {
             Expression::Binary(..) => "binary",
             Expression::Range(..) => "range",
             Expression::Block(..) => "block",
-            Expression::Invocation(..) => "command invocation",
+            Expression::Subexpression(..) => "subexpression",
             Expression::FullColumnPath(..) => "variable path",
             Expression::Boolean(..) => "boolean",
             Expression::ExternalCommand(..) => "external",
@@ -1199,7 +1199,7 @@ impl Expression {
                     || values.iter().any(|v| v.iter().any(|se| se.has_it_usage()))
             }
             Expression::List(list) => list.iter().any(|se| se.has_it_usage()),
-            Expression::Invocation(block) => block.has_it_usage(),
+            Expression::Subexpression(block) => block.has_it_usage(),
             Expression::Binary(binary) => binary.left.has_it_usage() || binary.right.has_it_usage(),
             Expression::FullColumnPath(path) => path.head.has_it_usage(),
             Expression::Range(range) => {
@@ -1240,7 +1240,7 @@ impl Expression {
                     output.extend(item.get_free_variables(known_variables));
                 }
             }
-            Expression::Invocation(block) | Expression::Block(block) => {
+            Expression::Subexpression(block) | Expression::Block(block) => {
                 output.extend(block.get_free_variables(known_variables));
             }
             Expression::Binary(binary) => {
diff --git a/tests/shell/pipeline/commands/internal.rs b/tests/shell/pipeline/commands/internal.rs
index 2ddda4b9df..e5184258d8 100644
--- a/tests/shell/pipeline/commands/internal.rs
+++ b/tests/shell/pipeline/commands/internal.rs
@@ -116,7 +116,7 @@ fn tags_persist_through_vars() {
 }
 
 #[test]
-fn invocation_properly_redirects() {
+fn subexpression_properly_redirects() {
     let actual = nu!(
         cwd: ".",
         r#"
@@ -128,7 +128,7 @@ fn invocation_properly_redirects() {
 }
 
 #[test]
-fn argument_invocation() {
+fn argument_subexpression() {
     let actual = nu!(
         cwd: ".",
         r#"
@@ -140,8 +140,8 @@ fn argument_invocation() {
 }
 
 #[test]
-fn invocation_handles_dot() {
-    Playground::setup("invocation_handles_dot", |dirs, sandbox| {
+fn subexpression_handles_dot() {
+    Playground::setup("subexpression_handles_dot", |dirs, sandbox| {
         sandbox.with_files(vec![FileWithContentToBeTrimmed(
             "nu_times.csv",
             r#"
@@ -575,7 +575,7 @@ fn run_dynamic_blocks() {
 
 #[cfg(feature = "which")]
 #[test]
-fn argument_invocation_reports_errors() {
+fn argument_subexpression_reports_errors() {
     let actual = nu!(
         cwd: ".",
         "echo (ferris_is_not_here.exe)"