The verb eat has 6 senses (first 6 from tagged texts)
1. (479) eat -- (take in solid food; "She was eating a banana"; "What did you eat for dinner last night?")
2. (146) eat -- (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. (37) feed, eat -- (take in food; used of animals only; "This dog doesn't eat certain kinds of meat"; "What do whales eat?")
4. (11) consume, eat up, use up, eat, deplete, exhaust, run through, wipe out -- (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")
5. (6) eat, eat on -- (worry or cause anxiety in a persistent way; "What's eating you?")
6. (1) corrode, eat, rust -- (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")