diff --git a/src/types/index.ts b/src/types/index.ts
index 5178bec8..11a8daed 100644
--- a/src/types/index.ts
+++ b/src/types/index.ts
@@ -44,8 +44,11 @@ export type { default as OmitByType } from './omit-by-type.type'
 export type { default as OneOrMany } from './one-or-many.type'
 export type { default as OrDeepPartial } from './or-deep-partial.type'
 export type { default as OrNever } from './or-never.type'
+export type { default as OrNil } from './or-nil.type'
+export type { default as OrNull } from './or-null.type'
 export type { default as OrPartial } from './or-partial.type'
 export type { default as OrPromise } from './or-promise.type'
+export type { default as OrUndefined } from './or-undefined.type'
 export type { default as Overwrite } from './overwrite.type'
 export type { default as PartialByRequired } from './partial-by-required.type'
 export type { default as PartialBy } from './partial-by.type'
diff --git a/src/types/or-nil.type.ts b/src/types/or-nil.type.ts
new file mode 100644
index 00000000..56d1cc12
--- /dev/null
+++ b/src/types/or-nil.type.ts
@@ -0,0 +1,15 @@
+import type NIL from './nil.type'
+
+/**
+ * @file Type Definitions - OrNil
+ * @module tutils/types/OrNil
+ */
+
+/**
+ * Type representing a value that also be `NIL`.
+ *
+ * @template T - Value type
+ */
+type OrNil<T> = T | NIL
+
+export default OrNil
diff --git a/src/types/or-null.type.ts b/src/types/or-null.type.ts
new file mode 100644
index 00000000..0b1866ed
--- /dev/null
+++ b/src/types/or-null.type.ts
@@ -0,0 +1,13 @@
+/**
+ * @file Type Definitions - OrNull
+ * @module tutils/types/OrNull
+ */
+
+/**
+ * Type representing a value that also be `null`.
+ *
+ * @template T - Value type
+ */
+type OrNull<T> = T | null
+
+export default OrNull
diff --git a/src/types/or-undefined.type.ts b/src/types/or-undefined.type.ts
new file mode 100644
index 00000000..45f62c83
--- /dev/null
+++ b/src/types/or-undefined.type.ts
@@ -0,0 +1,13 @@
+/**
+ * @file Type Definitions - OrUndefined
+ * @module tutils/types/OrUndefined
+ */
+
+/**
+ * Type representing a value that also be `undefined`.
+ *
+ * @template T - Value type
+ */
+type OrUndefined<T> = T | undefined
+
+export default OrUndefined