eat

from The American Heritage® Dictionary of the English Language, 5th Edition.

• intransitive verb To take into the body by the mouth for digestion or absorption.
• intransitive verb To take in and absorb as food.
• intransitive verb To include habitually or by preference in one's diet.
• intransitive verb To destroy, ravage, or use up by or as if by ingesting.
• intransitive verb To erode or corrode.
• intransitive verb To produce by eating.
• intransitive verb Slang To absorb the cost or expense of.
• intransitive verb Informal To bother or annoy.
• intransitive verb Vulgar slang To perform cunnilingus or anilingus on. Often used with out.
• intransitive verb To consume food.
• intransitive verb To have or take a meal.
• intransitive verb To exercise a consuming or eroding effect.
• intransitive verb To cause persistent annoyance or distress.
• idiom (eat crow) To be forced to accept a humiliating defeat.
• idiom (eat (one's) heart out) To feel bitter anguish or grief.
• idiom (eat (one's) heart out) To be consumed by jealousy.
• idiom (eat (one's) words) To retract something that one has said.
• idiom (eat out of (someone's) hand) To be manipulated or dominated by another.
• idiom (eat (someone) alive) To overwhelm or defeat thoroughly.

from The Century Dictionary.

• To masticate and swallow as nourishment; partake of or devour as food: said especially of solids: as, to eat bread.
• To corrode; wear away; gnaw into; consume; waste: generally with away, out, up, or into: as, rust has eaten away the surface; lines eaten out by aqua fortis; these cares eat up all my time.
• To take food; feed.
• To make way by corrosion; gnaw; penetrate or excavate by disorganization or destruction of substance: as, a cancer eats into the flesh.
• To taste; relish: as, it eats like the finest peach.

from the GNU version of the Collaborative International Dictionary of English.

• intransitive verb To take food; to feed; especially, to take solid, in distinction from liquid, food; to board.
• intransitive verb To taste or relish.
• intransitive verb To make one's way slowly.
• intransitive verb to make way by corrosion; to gnaw; to consume.
• intransitive verb (Naut.) to keep the course when closehauled with but little steering; -- said of a vessel.
• transitive verb To chew and swallow as food; to devour; -- said especially of food not liquid.
• transitive verb To corrode, as metal, by rust; to consume the flesh, as a cancer; to waste or wear away; to destroy gradually; to cause to disappear.
• transitive verb See under Humble.
• transitive verb (partitive use).
• transitive verb to retract what one has said. (See the Citation under Blurt.)
• transitive verb to consume completely.
• transitive verb (Naut.) to gain slowly to windward of her.

from Wiktionary, Creative Commons Attribution/Share-Alike License.

• verb transitive, intransitive To consume (something solid or semi-solid, usually food) by putting it into the mouth and swallowing it.
• verb intransitive To consume a meal.
• verb intransitive, ergative To be eaten.
• verb transitive To destroy, consume, or use up.
• verb transitive, informal To cause (someone) to worry.
• verb transitive, business To take the loss in a transaction.
• verb transitive, intransitive To corrode or erode.
• verb transitive, informal To damage, destroy, or fail to eject a removable part or an inserted object.