/ Dictionary / Index O one-acter: Meaning and Definition of Find definitions for: one-act•er Pronunciation: (wun'ak'tur), [key] — n. Informal. a short play consisting of one act. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. one-a-cat one another Related Content Daily Word Quiz: cur Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language