diff --git a/mute-interpreter/src/env/standard.rs b/mute-interpreter/src/env/standard.rs
index a6a9757..f6a3c15 100644
--- a/mute-interpreter/src/env/standard.rs
+++ b/mute-interpreter/src/env/standard.rs
@@ -16,7 +16,7 @@ pub(super) fn standard() -> HashMap<String, Value> {
         (
             "defun",
             inline! {
-                (macro* (name args body) ~(define (,name (fn* ,args ,body))) )
+                (macro* (name args body) ~(define (,name (lambda ,args ,body))) )
             },
         ),
         (
diff --git a/mute-interpreter/src/evaluator.rs b/mute-interpreter/src/evaluator.rs
index 70a6f69..3a0604c 100644
--- a/mute-interpreter/src/evaluator.rs
+++ b/mute-interpreter/src/evaluator.rs
@@ -385,7 +385,7 @@ mod test {
     #[case("(List.count {:a 1})", "1")]
     // Environment manipulation
     #[case("(define (asdf (+ 2 2))) (+ asdf 2)", "6")]
-    #[case("(define (add (fn* (a b) (+ a b)))) (add 1 2)", "3")]
+    #[case("(define (add (lambda (a b) (+ a b)))) (add 1 2)", "3")]
     #[case("(let* ((a 2)) (+ a 2))", "4")]
     // Branching
     #[case("(if true true false)", "true")]
@@ -394,16 +394,16 @@ mod test {
     #[case("(if false 3)", "()")]
     // Functions
     #[case(
-        "(define (factorial (fn* (n) (if
+        "(define (factorial (lambda (n) (if
                                (<= n 1)
                                1
                                (* n (factorial (- n 1)))))))
          (factorial 5)",
         "120"
     )]
-    #[case("((fn* (a) a) 3)", "3")]
-    #[case("((fn* (a) (+ a 2)) 1)", "3")]
-    #[case("((fn* (a b) (+ a b)) 1 2)", "3")]
+    #[case("((lambda (a) a) 3)", "3")]
+    #[case("((lambda (a) (+ a 2)) 1)", "3")]
+    #[case("((lambda (a b) (+ a b)) 1 2)", "3")]
     // Boolean operations
     #[case("(eq? 1 1)", "true")]
     #[case("(eq? 1 2)", "false")]
@@ -439,12 +439,12 @@ mod test {
     #[case("(List.push-back [1 2 3] 4)", "[1 2 3 4]")]
     #[case("(List.pop-back [1 2 3 4])", "[1 2 3]")]
     // Iteration
-    #[case("(map '(1 2 3) (fn* (x) (* x x)))", "(1 4 9)")]
-    #[case("(filter '(1 2 3) (fn* (x) (> x 1)))", "(2 3)")]
+    #[case("(map '(1 2 3) (lambda (x) (* x x)))", "(1 4 9)")]
+    #[case("(filter '(1 2 3) (lambda (x) (> x 1)))", "(2 3)")]
     #[case("(reduce '(1 2 3 4) +)", "10")]
-    #[case("(reduce '(1 2 3 4) (fn* (lhs rhs) (+ lhs rhs)))", "10")]
+    #[case("(reduce '(1 2 3 4) (lambda (lhs rhs) (+ lhs rhs)))", "10")]
     #[case("(fold '(1 2 3 4) 5 +)", "15")]
-    #[case("(fold '(1 2 3 4) 5 (fn* (lhs rhs) (+ lhs rhs)))", "15")]
+    #[case("(fold '(1 2 3 4) 5 (lambda (lhs rhs) (+ lhs rhs)))", "15")]
     fn test_evaluator(#[case] input: &str, #[case] expected: &str) {
         dbg!(input);
 
diff --git a/mute-macros/src/lib.rs b/mute-macros/src/lib.rs
index 70771b0..bb293ff 100644
--- a/mute-macros/src/lib.rs
+++ b/mute-macros/src/lib.rs
@@ -91,8 +91,8 @@ mod tests {
     // Specials
     #[case("(define (a 1))")]
     #[case("(define (a 1) (b 2))")]
-    #[case("(fn* () (+ 1 1))")]
-    #[case("(fn* (a b) (+ a b))")]
+    #[case("(lambda () (+ 1 1))")]
+    #[case("(lambda (a b) (+ a b))")]
     #[case("(if true 1 2)")]
     fn test_format_node(#[case] input: &str) {
         set_snapshot_suffix!("{}", input);
diff --git a/mute-macros/src/snapshots/mute_macros__tests__format_node@(lambda () (+ 1 1)).snap b/mute-macros/src/snapshots/mute_macros__tests__format_node@(lambda () (+ 1 1)).snap
new file mode 100644
index 0000000..78ac5e8
--- /dev/null
+++ b/mute-macros/src/snapshots/mute_macros__tests__format_node@(lambda () (+ 1 1)).snap	
@@ -0,0 +1,5 @@
+---
+source: mute-macros/src/lib.rs
+expression: res
+---
+Node::Function(vec![Node::List(vec![].into()), Node::List(vec![Node::Symbol("+".to_string()), Node::Int(1), Node::Int(1)].into())].into())
diff --git a/mute-macros/src/snapshots/mute_macros__tests__format_node@(lambda (a b) (+ a b)).snap b/mute-macros/src/snapshots/mute_macros__tests__format_node@(lambda (a b) (+ a b)).snap
new file mode 100644
index 0000000..cc4be4a
--- /dev/null
+++ b/mute-macros/src/snapshots/mute_macros__tests__format_node@(lambda (a b) (+ a b)).snap	
@@ -0,0 +1,5 @@
+---
+source: mute-macros/src/lib.rs
+expression: res
+---
+Node::Function(vec![Node::List(vec![Node::Symbol("a".to_string()), Node::Symbol("b".to_string())].into()), Node::List(vec![Node::Symbol("+".to_string()), Node::Symbol("a".to_string()), Node::Symbol("b".to_string())].into())].into())
diff --git a/mute-parser/src/lexer.rs b/mute-parser/src/lexer.rs
index 4f3b4db..cfa1b84 100644
--- a/mute-parser/src/lexer.rs
+++ b/mute-parser/src/lexer.rs
@@ -211,7 +211,7 @@ fn read_ident(input: &mut Peekable<Chars>, first: char) -> Token {
         "true" => Token::True,
         "false" => Token::False,
         "nil" => Token::Nil,
-        "fn*" => Token::Function,
+        "lambda" => Token::Function,
         "macro*" => Token::Macro,
         "define" => Token::Define,
         "let*" => Token::Let,
diff --git a/mute-parser/src/node.rs b/mute-parser/src/node.rs
index b991215..3c55d65 100644
--- a/mute-parser/src/node.rs
+++ b/mute-parser/src/node.rs
@@ -111,7 +111,7 @@ impl std::fmt::Display for Node {
             Node::Define(body) => write!(f, "(define {})", reduce_list(body)),
             Node::Let(body) => write!(f, "(let* {})", reduce_list(body)),
             Node::Macro(body) => write!(f, "(macro* {})", reduce_list(body)),
-            Node::Function(body) => write!(f, "(fn* {})", reduce_list(body)),
+            Node::Function(body) => write!(f, "(lambda {})", reduce_list(body)),
             Node::If(body) => write!(f, "(if {})", reduce_list(body)),
 
             Node::Quote(node) => write!(f, "'{node}"),