From WordNet (r) 3.0 (2006):
chew
n 1: a wad of something chewable as tobacco [syn: chew,
chaw, cud, quid, plug, wad]
2: biting and grinding food in your mouth so it becomes soft
enough to swallow [syn: chew, chewing, mastication,
manduction]
v 1: 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" [syn: chew,
masticate, manducate, jaw]