nibble

American Heritage® Dictionary of the English Language, Fourth Edition

1. v. To bite at gently and repeatedly.
2. v. To eat with small, quick bites or in small morsels: nibble a cracker.
3. v. To wear away or diminish bit by bit: "If you start compromising too early . . . they nibble you to death” ( People).
4. v. To take small or hesitant bites: fish nibbling at the bait.
5. n. A very small quantity, especially of food; a morsel.
6. n. The act or an instance of nibbling.

Century Dictionary and Cyclopedia

1. To eat by biting or gnawing off small bits; gnaw.
2. To bite very slightly or gently; bite off small pieces of.
3. To catch; nab.
4. To bite gently; bite off small pieces: as, fishes nibble at the bait.
5. Figuratively, to carp; make a petty attack: with at.
6. To fidget the fingers about.
7. n. The act of nibbling; a little bite; also, a small morsel or bit.

Wiktionary

1. n. A small, quick bite taken with the front teeth.
2. n. Small snacks such as crisps/potato chips or nuts, often eaten to accompany drinks.
3. n. A unit of memory equal to a quarter of a byte, or two bits.
4. n. A unit of memory equal to half a byte, or four bits.
5. v. To eat with small, quick bites.

GNU Webster's 1913

1. v. To bite by little at a time; to seize gently with the mouth; to eat slowly or in small bits.
2. v. To bite upon something gently or cautiously; to eat a little of a thing, as by taking small bits cautiously.
3. n. A small or cautious bite.
4. n. An expression of interest, often tentative, as at the beginning of a sale or negotiation process.

WordNet 3.0

1. v. bite off very small pieces
2. n. a small byte
3. v. bite gently
4. v. eat intermittently; take small bites of
5. n. gentle biting