subordinate clause, dependent clause

a clause in a complex sentence that cannot stand alone as a complete sentence and that functions within the sentence as a noun or adjective or adverb

• restrictive clause — a subordinate clause that limits or restricts the meaning of the noun phrase it modifies
• nonrestrictive clause, descriptive clause — a subordinate clause that does not limit or restrict the meaning of the noun phrase it modifies

• clause — (grammar) an expression including a subject and predicate but not constituting a complete sentence

• complex sentence — a sentence composed of at least one main clause and one subordinate clause