/ Dictionary / Index C complement clause: Meaning and Definition of Find definitions for: com'plement clause" Pronunciation: [key] — Ling. Ling. a subordinate clause that functions as the subject, direct object, or prepositional object of a verb, as that you like it in I'm surprised that you like it. Also called Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. complementation complemented Related Content Daily Word Quiz: wary Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language