1. (noun)chew, chaw, cud, quid, plug, wad a wad of something chewable as tobacco
2. (noun)chew, chewing, mastication, manduction biting and grinding food in your mouth so it becomes soft enough to swallow
3. (verb)chew, masticate, manducate, jaw chew (food); to bite and grind with the teeth "He jawed his bubble gum"; "Chew your food and don't swallow it!"; "The cows were masticating the grass"