diff --git a/src/System.Management.Automation/engine/CoreAdapter.cs b/src/System.Management.Automation/engine/CoreAdapter.cs
index 42da612618..d8c2fec89a 100644
--- a/src/System.Management.Automation/engine/CoreAdapter.cs
+++ b/src/System.Management.Automation/engine/CoreAdapter.cs
@@ -3865,6 +3865,33 @@ namespace System.Management.Automation
             return entry.isStatic;
         }
 
+        /// <summary>
+        /// Get the string representation of the default value of passed-in parameter.
+        /// </summary>
+        /// <param name="parameterInfo">ParameterInfo containing the parameter's default value.</param>
+        /// <returns>String representation of the parameter's default value.</returns>
+        private static string GetDefaultValueStringRepresentation(ParameterInfo parameterInfo)
+        {
+            var parameterType = parameterInfo.ParameterType;
+            var parameterDefaultValue = parameterInfo.DefaultValue;
+
+            if (parameterDefaultValue == null)
+            {
+                return (parameterType.IsValueType || parameterType.IsGenericMethodParameter)
+                    ? "default"
+                    : "null";
+            }
+
+            if (parameterType.IsEnum)
+            {
+                return string.Format(CultureInfo.InvariantCulture, "{0}.{1}", parameterType.ToString(), parameterDefaultValue.ToString());
+            }
+
+            return (parameterDefaultValue is string)
+                ? string.Format(CultureInfo.InvariantCulture, "\"{0}\"", parameterDefaultValue.ToString())
+                : parameterDefaultValue.ToString();
+        }
+
         #endregion auxiliary methods and classes
 
         #region virtual
@@ -4457,6 +4484,13 @@ namespace System.Management.Automation
                     builder.Append(ToStringCodeMethods.Type(parameterType));
                     builder.Append(' ');
                     builder.Append(parameter.Name);
+
+                    if (parameter.HasDefaultValue)
+                    {
+                        builder.Append(" = ");
+                        builder.Append(GetDefaultValueStringRepresentation(parameter));
+                    }
+
                     builder.Append(", ");
                 }
 
diff --git a/test/powershell/engine/Api/GetMethodInfoOverloadDefinition.Tests.ps1 b/test/powershell/engine/Api/GetMethodInfoOverloadDefinition.Tests.ps1
new file mode 100644
index 0000000000..aa9fb40127
--- /dev/null
+++ b/test/powershell/engine/Api/GetMethodInfoOverloadDefinition.Tests.ps1
@@ -0,0 +1,178 @@
+# Copyright (c) Microsoft Corporation.
+# Licensed under the MIT License.
+
+Describe "Method definition Tests" -tags "CI" {
+
+    BeforeAll {
+        Add-Type -NameSpace OverloadDefinitionTest -Name TestClass -MemberDefinition @"
+public static void Bar() { }
+public static void Bar(int param) { }
+public static void Bar(int param1, string param2) { }
+public static string Bar(int? param1, string param2) { return param2; }
+"@
+
+        Add-Type -NameSpace MethodDefinitionTest -Name TestClass -MemberDefinition @"
+public static void TestMethod_Ref(ref int refParam) { }
+
+public static void TestMethod_InOut(in int inParam, out string outParam) { outParam = null; }
+
+public static void TestMethod_Params(params int[] intParams) { }
+
+public static void TestMethod_Generic1<T>(T param) { }
+
+public static void TestMethod_Generic2<T, U>(T param1, U param2) { }
+
+public static void TestMethod_OptInt(int optParam = int.MinValue) { }
+
+public static void TestMethod_OptString(string optParam = "test string") { }
+
+public static void TestMethod_OptStruct(DateTime optParam = new DateTime()) { }
+
+public static void TestMethod_OptEnum(UriKind optParam = UriKind.Relative) { }
+
+public static void TestMethod_OptGeneric<T>(T param = default) { }
+"@
+
+        $testCases = @(
+            @{
+                Description = "parameter passed by reference";
+                MethodName = "TestMethod_Ref";
+                ExpectedDefinition = "static void TestMethod_Ref([ref] int refParam)"
+            }
+            @{
+                Description = "in and out parameters";
+                MethodName = "TestMethod_InOut";
+                ExpectedDefinition = "static void TestMethod_InOut([ref] int inParam, [ref] string outParam)"
+            }
+            @{
+                Description = "parameters array";
+                MethodName = "TestMethod_Params";
+                ExpectedDefinition = "static void TestMethod_Params(Params int[] intParams)"
+            }
+            @{
+                Description = "one generic parameter";
+                MethodName = "TestMethod_Generic1";
+                ExpectedDefinition = "static void TestMethod_Generic1[T](T param)"
+            }
+            @{
+                Description = "two generic parameters";
+                MethodName = "TestMethod_Generic2";
+                ExpectedDefinition = "static void TestMethod_Generic2[T, U](T param1, U param2)"
+            }
+            @{
+                Description = "optional int parameter";
+                MethodName = "TestMethod_OptInt";
+                ExpectedDefinition = "static void TestMethod_OptInt(int optParam = $([int]::MinValue))"
+            }
+            @{
+                Description = "optional string parameter";
+                MethodName = "TestMethod_OptString";
+                ExpectedDefinition = 'static void TestMethod_OptString(string optParam = "test string")'
+            }
+            @{
+                Description = "optional struct parameter";
+                MethodName = "TestMethod_OptStruct";
+                ExpectedDefinition = 'static void TestMethod_OptStruct(datetime optParam = default)'
+            }
+            @{
+                Description = "optional enum parameter";
+                MethodName = "TestMethod_OptEnum";
+                ExpectedDefinition = "static void TestMethod_OptEnum(System.UriKind optParam = System.UriKind.Relative)"
+            }
+            @{
+                Description = "optional generic parameter";
+                MethodName = "TestMethod_OptGeneric";
+                ExpectedDefinition = "static void TestMethod_OptGeneric[T](T param = default)"
+            }
+        )
+    }
+
+    Context "Verify method definitions" {
+
+        It "Get methods' overload definitions" {
+            $definitions = ([OverloadDefinitionTest.TestClass]::Bar).OverloadDefinitions
+            $definitions.Count | Should -Be 4
+            $definitions[0] | Should -BeExactly "static void Bar()"
+            $definitions[1] | Should -BeExactly "static void Bar(int param)"
+            $definitions[2] | Should -BeExactly "static void Bar(int param1, string param2)"
+            $definitions[3] | Should -BeExactly "static string Bar(System.Nullable[int] param1, string param2)"
+        }
+
+        It "Get definition of the method with <Description>" -TestCases $testCases {
+            param($MethodName, $ExpectedDefinition)
+
+            $definition = ([MethodDefinitionTest.TestClass] | Get-Member -Type Method -Static $MethodName).Definition
+            $definition | Should -BeExactly $ExpectedDefinition
+
+            $overloadDefinition = ([MethodDefinitionTest.TestClass]::$MethodName).OverloadDefinitions
+            $overloadDefinition | Should -BeExactly $definition
+        }
+    }
+
+    Context "Verify method definitions' tooltip" {
+
+        It "Tooltip should contain methods' overload definitions" {
+            $result = (TabExpansion2 -inputScript ($s = '[OverloadDefinitionTest.TestClass]::Bar') -cursorColumn $s.Length).CompletionMatches
+            $tooltipParts = $result.ToolTip -split "\r?\n"
+
+            $tooltipParts.Count | Should -Be 4
+            $tooltipParts[0] | Should -BeExactly "static void Bar()"
+            $tooltipParts[1] | Should -BeExactly "static void Bar(int param)"
+            $tooltipParts[2] | Should -BeExactly "static void Bar(int param1, string param2)"
+            $tooltipParts[3] | Should -BeExactly "static string Bar(System.Nullable[int] param1, string param2)"
+        }
+
+        It "Tooltip should contain definition of the method with an optional parameter" {
+            $result = (TabExpansion2 -inputScript ($s = "[MethodDefinitionTest.TestClass]::TestMethod_OptInt") -cursorColumn $s.Length).CompletionMatches
+            $result.ToolTip | Should -BeExactly "static void TestMethod_OptInt(int optParam = $([int]::MinValue))"
+        }
+    }
+
+    Context "Verify Definition of Parameterized Property" {
+        BeforeAll {
+            Add-Type -TypeDefinition @"
+namespace TestParameterizedPropertyDefinition {
+    public class TestClass1
+    {
+        private string[] _indexerArray = new string[1];
+        public string this[int i]
+        {
+            get => _indexerArray[i];
+            set => _indexerArray[i] = value;
+        }
+    }
+
+    public class TestClass2
+    {
+        public int this[int i] => 42;
+    }
+
+    public class TestClass3
+    {
+        [System.Runtime.CompilerServices.IndexerName("TheItem")]
+        public int this[int i] => 42;
+    }
+}
+"@
+        }
+
+        It "Get definition of parametrized property" {
+            $obj = [TestParameterizedPropertyDefinition.TestClass1]::new()
+            $result = $obj | Get-Member -Type ParameterizedProperty
+            $result.Definition | Should -BeExactly "string Item(int i) {get;set;}"
+        }
+
+        It "Get definition of readonly parametrized property" {
+            $obj = [TestParameterizedPropertyDefinition.TestClass2]::new()
+            $result = $obj | Get-Member -Type ParameterizedProperty
+            $result.Definition | Should -BeExactly "int Item(int i) {get;}"
+        }
+
+        It "Get definition of parametrized property with changed name" {
+            $obj = [TestParameterizedPropertyDefinition.TestClass3]::new()
+            $result = $obj | Get-Member -Type ParameterizedProperty
+            $result.Name | Should -BeExactly "TheItem"
+            $result.Definition | Should -BeExactly "int TheItem(int i) {get;}"
+        }
+    }
+}