/ Dictionary / Index A addlebrained: Meaning and Definition of Find definitions for: ad•dle•brained Pronunciation: (ad'l-brānd"), [key] — adj. having a muddled or confused mind; foolish, silly, or illogical. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: addlebrained (Thesaurus) addle addlepated Related Content Daily Word Quiz: acquiesce Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language