/ Dictionary / Index B beefed-up: Meaning and Definition of Find definitions for: beefed-up Pronunciation: (bēft'up'), [key] — adj. strengthened or reinforced. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: beefed-up (Thesaurus) beefeater beef extract 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