From WordNet (r) 3.0 (2006):
eat
v 1: take in solid food; "She was eating a banana"; "What did
you eat for dinner last night?"
2: eat a meal; take a meal; "We did not eat until 10 P.M.
because there were so many phone calls"; "I didn't eat yet,
so I gladly accept your invitation"
3: take in food; used of animals only; "This dog doesn't eat
certain kinds of meat"; "What do whales eat?" [syn: feed,
eat]
4: worry or cause anxiety in a persistent way; "What's eating
you?" [syn: eat, eat on]
5: use up (resources or materials); "this car consumes a lot of
gas"; "We exhausted our savings"; "They run through 20
bottles of wine a week" [syn: consume, eat up, use up,
eat, deplete, exhaust, run through, wipe out]
6: cause to deteriorate due to the action of water, air, or an
acid; "The acid corroded the metal"; "The steady dripping of
water rusted the metal stopper in the sink" [syn: corrode,
eat, rust]