This document defines and provides examples of noun clauses. A noun clause is a dependent clause that functions as a noun in a sentence. It typically begins with a relative pronoun like who, whom, whose, which, that, what, when, why, or wherever and includes a subject and verb. Noun clauses can serve as the subject, direct object, object of a preposition, subject complement, or appositive in a sentence. Examples of different types of noun clauses and their functions are given.