adjective, heft·i·er, heft·i·est. 1.heavy; weighty: a hefty book.
2.big and strong; powerful; muscular: a hefty athlete.
3.impressively large or substantial: a hefty increase in salary.
Related forms heft·i·ly, adverb
heft·i·ness, noun
Synonyms
2. robust, husky, burly, stalwart.