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. in the plural, nibbles Small snacks such as crisps/potato chips or nuts, often eaten to accompany drinks.
3. v. transitive To eat with small, quick bites.
4. v. transitive To bite lightly.

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