diff --git a/src/libraries/System.Private.CoreLib/src/System/Numerics/Vector.cs b/src/libraries/System.Private.CoreLib/src/System/Numerics/Vector.cs
index 355c19d4cfe794..6416463cb3ad6d 100644
--- a/src/libraries/System.Private.CoreLib/src/System/Numerics/Vector.cs
+++ b/src/libraries/System.Private.CoreLib/src/System/Numerics/Vector.cs
@@ -301,6 +301,7 @@ public static Vector<T> ClampNative<T>(Vector<T> value, Vector<T> min, Vector<T>
         /// <param name="right">The vector that is selected when the corresponding bit in <paramref name="condition" /> is zero.</param>
         /// <typeparam name="T">The type of the elements in the vector.</typeparam>
         /// <returns>A vector whose bits come from <paramref name="left" /> or <paramref name="right" /> based on the value of <paramref name="condition" />.</returns>
+        /// <remarks>The returned vector is equivalent to <paramref name="condition" /> <c>?</c> <paramref name="left" /> <c>:</c> <paramref name="right" /> on a per-bit basis.</remarks>
         [Intrinsic]
         [MethodImpl(MethodImplOptions.AggressiveInlining)]
         public static Vector<T> ConditionalSelect<T>(Vector<T> condition, Vector<T> left, Vector<T> right) => (left & condition) | AndNot(right, condition);
@@ -310,6 +311,7 @@ public static Vector<T> ClampNative<T>(Vector<T> value, Vector<T> min, Vector<T>
         /// <param name="left">The vector that is selected when the corresponding bit in <paramref name="condition" /> is one.</param>
         /// <param name="right">The vector that is selected when the corresponding bit in <paramref name="condition" /> is zero.</param>
         /// <returns>A vector whose bits come from <paramref name="left" /> or <paramref name="right" /> based on the value of <paramref name="condition" />.</returns>
+        /// <remarks>The returned vector is equivalent to <paramref name="condition" /> <c>?</c> <paramref name="left" /> <c>:</c> <paramref name="right" /> on a per-bit basis.</remarks>
         [Intrinsic]
         public static Vector<float> ConditionalSelect(Vector<int> condition, Vector<float> left, Vector<float> right) => ConditionalSelect(condition.As<int, float>(), left, right);
 
@@ -318,6 +320,7 @@ public static Vector<T> ClampNative<T>(Vector<T> value, Vector<T> min, Vector<T>
         /// <param name="left">The vector that is selected when the corresponding bit in <paramref name="condition" /> is one.</param>
         /// <param name="right">The vector that is selected when the corresponding bit in <paramref name="condition" /> is zero.</param>
         /// <returns>A vector whose bits come from <paramref name="left" /> or <paramref name="right" /> based on the value of <paramref name="condition" />.</returns>
+        /// <remarks>The returned vector is equivalent to <paramref name="condition" /> <c>?</c> <paramref name="left" /> <c>:</c> <paramref name="right" /> on a per-bit basis.</remarks>
         [Intrinsic]
         public static Vector<double> ConditionalSelect(Vector<long> condition, Vector<double> left, Vector<double> right) => ConditionalSelect(condition.As<long, double>(), left, right);
 
diff --git a/src/libraries/System.Private.CoreLib/src/System/Runtime/Intrinsics/ISimdVector_2.cs b/src/libraries/System.Private.CoreLib/src/System/Runtime/Intrinsics/ISimdVector_2.cs
index ec4f3640f1475c..8641901912e89a 100644
--- a/src/libraries/System.Private.CoreLib/src/System/Runtime/Intrinsics/ISimdVector_2.cs
+++ b/src/libraries/System.Private.CoreLib/src/System/Runtime/Intrinsics/ISimdVector_2.cs
@@ -140,6 +140,7 @@ internal unsafe interface ISimdVector<TSelf, T>
         /// <param name="right">The vector that is selected when the corresponding bit in <paramref name="condition" /> is zero.</param>
         /// <returns>A vector whose bits come from <paramref name="left" /> or <paramref name="right" /> based on the value of <paramref name="condition" />.</returns>
         /// <exception cref="NotSupportedException">The type of the elements in the vector (<typeparamref name="T" />) is not supported.</exception>
+        /// <remarks>The returned vector is equivalent to <paramref name="condition" /> <c>?</c> <paramref name="left" /> <c>:</c> <paramref name="right" /> on a per-bit basis.</remarks>
         static virtual TSelf ConditionalSelect(TSelf condition, TSelf left, TSelf right) => (left & condition) | (right & ~condition);
 
         /// <summary>Copies the per-element sign of a vector to the per-element sign of another vector.</summary>
diff --git a/src/libraries/System.Private.CoreLib/src/System/Runtime/Intrinsics/Vector128.cs b/src/libraries/System.Private.CoreLib/src/System/Runtime/Intrinsics/Vector128.cs
index 8fb3436cf3cf8e..8bf49d29f06f27 100644
--- a/src/libraries/System.Private.CoreLib/src/System/Runtime/Intrinsics/Vector128.cs
+++ b/src/libraries/System.Private.CoreLib/src/System/Runtime/Intrinsics/Vector128.cs
@@ -471,6 +471,7 @@ public static Vector128<T> ClampNative<T>(Vector128<T> value, Vector128<T> min,
         /// <param name="right">The vector that is selected when the corresponding bit in <paramref name="condition" /> is zero.</param>
         /// <returns>A vector whose bits come from <paramref name="left" /> or <paramref name="right" /> based on the value of <paramref name="condition" />.</returns>
         /// <exception cref="NotSupportedException">The type of <paramref name="condition" />, <paramref name="left" />, and <paramref name="right" /> (<typeparamref name="T" />) is not supported.</exception>
+        /// <remarks>The returned vector is equivalent to <paramref name="condition" /> <c>?</c> <paramref name="left" /> <c>:</c> <paramref name="right" /> on a per-bit basis.</remarks>
         [Intrinsic]
         [MethodImpl(MethodImplOptions.AggressiveInlining)]
         public static Vector128<T> ConditionalSelect<T>(Vector128<T> condition, Vector128<T> left, Vector128<T> right) => (left & condition) | AndNot(right, condition);
diff --git a/src/libraries/System.Private.CoreLib/src/System/Runtime/Intrinsics/Vector256.cs b/src/libraries/System.Private.CoreLib/src/System/Runtime/Intrinsics/Vector256.cs
index 6708b81a203610..8f623a742a3d63 100644
--- a/src/libraries/System.Private.CoreLib/src/System/Runtime/Intrinsics/Vector256.cs
+++ b/src/libraries/System.Private.CoreLib/src/System/Runtime/Intrinsics/Vector256.cs
@@ -336,6 +336,7 @@ public static Vector256<T> ClampNative<T>(Vector256<T> value, Vector256<T> min,
         /// <param name="right">The vector that is selected when the corresponding bit in <paramref name="condition" /> is zero.</param>
         /// <returns>A vector whose bits come from <paramref name="left" /> or <paramref name="right" /> based on the value of <paramref name="condition" />.</returns>
         /// <exception cref="NotSupportedException">The type of <paramref name="condition" />, <paramref name="left" />, and <paramref name="right" /> (<typeparamref name="T" />) is not supported.</exception>
+        /// <remarks>The returned vector is equivalent to <paramref name="condition" /> <c>?</c> <paramref name="left" /> <c>:</c> <paramref name="right" /> on a per-bit basis.</remarks>
         [Intrinsic]
         [MethodImpl(MethodImplOptions.AggressiveInlining)]
         public static Vector256<T> ConditionalSelect<T>(Vector256<T> condition, Vector256<T> left, Vector256<T> right) => (left & condition) | AndNot(right, condition);
diff --git a/src/libraries/System.Private.CoreLib/src/System/Runtime/Intrinsics/Vector512.cs b/src/libraries/System.Private.CoreLib/src/System/Runtime/Intrinsics/Vector512.cs
index 2b683f06524f45..b6cdd3801409d6 100644
--- a/src/libraries/System.Private.CoreLib/src/System/Runtime/Intrinsics/Vector512.cs
+++ b/src/libraries/System.Private.CoreLib/src/System/Runtime/Intrinsics/Vector512.cs
@@ -336,6 +336,7 @@ public static Vector512<T> ClampNative<T>(Vector512<T> value, Vector512<T> min,
         /// <param name="right">The vector that is selected when the corresponding bit in <paramref name="condition" /> is zero.</param>
         /// <returns>A vector whose bits come from <paramref name="left" /> or <paramref name="right" /> based on the value of <paramref name="condition" />.</returns>
         /// <exception cref="NotSupportedException">The type of <paramref name="condition" />, <paramref name="left" />, and <paramref name="right" /> (<typeparamref name="T" />) is not supported.</exception>
+        /// <remarks>The returned vector is equivalent to <paramref name="condition" /> <c>?</c> <paramref name="left" /> <c>:</c> <paramref name="right" /> on a per-bit basis.</remarks>
         [Intrinsic]
         [MethodImpl(MethodImplOptions.AggressiveInlining)]
         public static Vector512<T> ConditionalSelect<T>(Vector512<T> condition, Vector512<T> left, Vector512<T> right) => (left & condition) | AndNot(right, condition);
diff --git a/src/libraries/System.Private.CoreLib/src/System/Runtime/Intrinsics/Vector64.cs b/src/libraries/System.Private.CoreLib/src/System/Runtime/Intrinsics/Vector64.cs
index 570933c7abbba2..c201c4ec176e07 100644
--- a/src/libraries/System.Private.CoreLib/src/System/Runtime/Intrinsics/Vector64.cs
+++ b/src/libraries/System.Private.CoreLib/src/System/Runtime/Intrinsics/Vector64.cs
@@ -286,6 +286,7 @@ public static Vector64<T> ClampNative<T>(Vector64<T> value, Vector64<T> min, Vec
         /// <param name="right">The vector that is selected when the corresponding bit in <paramref name="condition" /> is zero.</param>
         /// <returns>A vector whose bits come from <paramref name="left" /> or <paramref name="right" /> based on the value of <paramref name="condition" />.</returns>
         /// <exception cref="NotSupportedException">The type of <paramref name="condition" />, <paramref name="left" />, and <paramref name="right" /> (<typeparamref name="T" />) is not supported.</exception>
+        /// <remarks>The returned vector is equivalent to <paramref name="condition" /> <c>?</c> <paramref name="left" /> <c>:</c> <paramref name="right" /> on a per-bit basis.</remarks>
         [Intrinsic]
         [MethodImpl(MethodImplOptions.AggressiveInlining)]
         public static Vector64<T> ConditionalSelect<T>(Vector64<T> condition, Vector64<T> left, Vector64<T> right) => (left & condition) | AndNot(right, condition);