/ Dictionary / Index H hefty: Meaning and Definition of Find definitions for: heft•y Pronunciation: (hef'tē), [key] — heft•i•er, heft•i•est. heavy; weighty: a hefty book. big and strong; powerful; muscular: a hefty athlete. impressively large or substantial: a hefty increase in salary. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: hefty (Thesaurus) heft hegari Related Content Daily Word Quiz: lyceum Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language