/ Dictionary / Index B beastly: Meaning and Definition of Find definitions for: beast•ly Pronunciation: (bēst'lē), [key] — adj., adv. -li•er, -li•est, —adj. of or like a beast; bestial. nasty; unpleasant; disagreeable. —adv. very; exceedingly: It's beastly cold out. disagreeably; outrageously: beastly rude. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: beastly (Thesaurus) beastings beast of burden Related Content Daily Word Quiz: secular Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language