diff --git a/src/language/__tests__/parser-test.js b/src/language/__tests__/parser-test.js
index 3dc1237493..65826f4ef8 100644
--- a/src/language/__tests__/parser-test.js
+++ b/src/language/__tests__/parser-test.js
@@ -363,11 +363,11 @@ describe('Parser', () => {
     expect(result.loc).to.equal(undefined);
   });
 
-  it('Experimental: allows parsing fragment defined variables', () => {
+  it('Legacy: allows parsing fragment defined variables', () => {
     const document = 'fragment a($v: Boolean = false) on t { f(v: $v) }';
 
     expect(() =>
-      parse(document, { experimentalFragmentVariables: true }),
+      parse(document, { allowLegacyFragmentVariables: true }),
     ).to.not.throw();
     expect(() => parse(document)).to.throw('Syntax Error');
   });
diff --git a/src/language/__tests__/printer-test.js b/src/language/__tests__/printer-test.js
index 014e21b623..d96b3c2bc4 100644
--- a/src/language/__tests__/printer-test.js
+++ b/src/language/__tests__/printer-test.js
@@ -117,12 +117,10 @@ describe('Printer: Query document', () => {
     );
   });
 
-  it('Experimental: prints fragment with variable directives', () => {
+  it('Legacy: prints fragment with variable directives', () => {
     const queryASTWithVariableDirective = parse(
       'fragment Foo($foo: TestType @test) on TestType @testDirective { id }',
-      {
-        experimentalFragmentVariables: true,
-      },
+      { allowLegacyFragmentVariables: true },
     );
     expect(print(queryASTWithVariableDirective)).to.equal(dedent`
       fragment Foo($foo: TestType @test) on TestType @testDirective {
@@ -131,14 +129,14 @@ describe('Printer: Query document', () => {
     `);
   });
 
-  it('Experimental: correctly prints fragment defined variables', () => {
+  it('Legacy: correctly prints fragment defined variables', () => {
     const fragmentWithVariable = parse(
       `
         fragment Foo($a: ComplexType, $b: Boolean = false) on TestType {
           id
         }
       `,
-      { experimentalFragmentVariables: true },
+      { allowLegacyFragmentVariables: true },
     );
     expect(print(fragmentWithVariable)).to.equal(dedent`
       fragment Foo($a: ComplexType, $b: Boolean = false) on TestType {
diff --git a/src/language/__tests__/visitor-test.js b/src/language/__tests__/visitor-test.js
index 5d6473400a..a0e732e57e 100644
--- a/src/language/__tests__/visitor-test.js
+++ b/src/language/__tests__/visitor-test.js
@@ -438,10 +438,10 @@ describe('Visitor', () => {
     ]);
   });
 
-  it('Experimental: visits variables defined in fragments', () => {
+  it('Legacy: visits variables defined in fragments', () => {
     const ast = parse('fragment a($v: Boolean = false) on t { f }', {
       noLocation: true,
-      experimentalFragmentVariables: true,
+      allowLegacyFragmentVariables: true,
     });
     const visited = [];
 
diff --git a/src/language/ast.d.ts b/src/language/ast.d.ts
index 61cb9f4eb5..693657d642 100644
--- a/src/language/ast.d.ts
+++ b/src/language/ast.d.ts
@@ -297,8 +297,7 @@ export interface FragmentDefinitionNode {
   readonly kind: 'FragmentDefinition';
   readonly loc?: Location;
   readonly name: NameNode;
-  // Note: fragment variable definitions are experimental and may be changed
-  // or removed in the future.
+  // Note: fragment variable definitions are deprecated and will removed in v17.0.0
   readonly variableDefinitions?: ReadonlyArray<VariableDefinitionNode>;
   readonly typeCondition: NamedTypeNode;
   readonly directives?: ReadonlyArray<DirectiveNode>;
diff --git a/src/language/ast.js b/src/language/ast.js
index 75e50f542d..c0a9a615e7 100644
--- a/src/language/ast.js
+++ b/src/language/ast.js
@@ -323,8 +323,7 @@ export type FragmentDefinitionNode = {|
   +kind: 'FragmentDefinition',
   +loc?: Location,
   +name: NameNode,
-  // Note: fragment variable definitions are experimental and may be changed
-  // or removed in the future.
+  // Note: fragment variable definitions are deprecated and will removed in v17.0.0
   +variableDefinitions?: $ReadOnlyArray<VariableDefinitionNode>,
   +typeCondition: NamedTypeNode,
   +directives?: $ReadOnlyArray<DirectiveNode>,
diff --git a/src/language/parser.d.ts b/src/language/parser.d.ts
index 80686cb537..60cbf20e3b 100644
--- a/src/language/parser.d.ts
+++ b/src/language/parser.d.ts
@@ -13,7 +13,7 @@ export interface ParseOptions {
   noLocation?: boolean;
 
   /**
-   * EXPERIMENTAL:
+   * @deprecated will be removed in the v17.0.0
    *
    * If enabled, the parser will understand and parse variable definitions
    * contained in a fragment definition. They'll be represented in the
@@ -25,10 +25,8 @@ export interface ParseOptions {
    *     ...
    *   }
    *
-   * Note: this feature is experimental and may change or be removed in the
-   * future.
    */
-  experimentalFragmentVariables?: boolean;
+  allowLegacyFragmentVariables?: boolean;
 }
 
 /**
diff --git a/src/language/parser.js b/src/language/parser.js
index 2f1ff29828..449a0af1a8 100644
--- a/src/language/parser.js
+++ b/src/language/parser.js
@@ -67,7 +67,7 @@ export type ParseOptions = {|
   noLocation?: boolean,
 
   /**
-   * EXPERIMENTAL:
+   * @deprecated will be removed in the v17.0.0
    *
    * If enabled, the parser will understand and parse variable definitions
    * contained in a fragment definition. They'll be represented in the
@@ -79,10 +79,8 @@ export type ParseOptions = {|
    *     ...
    *   }
    *
-   * Note: this feature is experimental and may change or be removed in the
-   * future.
    */
-  experimentalFragmentVariables?: boolean,
+  allowLegacyFragmentVariables?: boolean,
 |};
 
 /**
@@ -458,10 +456,10 @@ export class Parser {
   parseFragmentDefinition(): FragmentDefinitionNode {
     const start = this._lexer.token;
     this.expectKeyword('fragment');
-    // Experimental support for defining variables within fragments changes
+    // Legacy support for defining variables within fragments changes
     // the grammar of FragmentDefinition:
     //   - fragment FragmentName VariableDefinitions? on TypeCondition Directives? SelectionSet
-    if (this._options?.experimentalFragmentVariables === true) {
+    if (this._options?.allowLegacyFragmentVariables === true) {
       return {
         kind: Kind.FRAGMENT_DEFINITION,
         name: this.parseFragmentName(),
diff --git a/src/language/visitor.d.ts b/src/language/visitor.d.ts
index 22e634663c..2f8ac29490 100644
--- a/src/language/visitor.d.ts
+++ b/src/language/visitor.d.ts
@@ -78,8 +78,7 @@ export const QueryDocumentKeys: {
   // prettier-ignore
   FragmentDefinition: [
     'name',
-    // Note: fragment variable definitions are experimental and may be changed
-    // or removed in the future.
+    // Note: fragment variable definitions are deprecated and will removed in v17.0.0
     'variableDefinitions',
     'typeCondition',
     'directives',
diff --git a/src/language/visitor.js b/src/language/visitor.js
index ed1db5b720..4cf64a4f08 100644
--- a/src/language/visitor.js
+++ b/src/language/visitor.js
@@ -67,8 +67,7 @@ export const QueryDocumentKeys: VisitorKeyMap<ASTKindToNode> = {
   InlineFragment: ['typeCondition', 'directives', 'selectionSet'],
   FragmentDefinition: [
     'name',
-    // Note: fragment variable definitions are experimental and may be changed
-    // or removed in the future.
+    // Note: fragment variable definitions are deprecated and will removed in v17.0.0
     'variableDefinitions',
     'typeCondition',
     'directives',
diff --git a/src/utilities/buildASTSchema.js b/src/utilities/buildASTSchema.js
index 420da7582a..ab3ae1b6aa 100644
--- a/src/utilities/buildASTSchema.js
+++ b/src/utilities/buildASTSchema.js
@@ -98,7 +98,7 @@ export function buildSchema(
 ): GraphQLSchema {
   const document = parse(source, {
     noLocation: options?.noLocation,
-    experimentalFragmentVariables: options?.experimentalFragmentVariables,
+    allowLegacyFragmentVariables: options?.allowLegacyFragmentVariables,
   });
 
   return buildASTSchema(document, {