/ Dictionary / Index N no-brainer: Meaning and Definition of Find definitions for: no-brain•er Pronunciation: (nō'brā'nur), [key] anything requiring little thought or effort; something easy or simple to understand or do. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: no-brainer (Thesaurus) nobody N.O.C. Related Content Daily Word Quiz: soporific Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language