sneak

American Heritage® Dictionary of the English Language, Fourth Edition

1. v. To go or move in a quiet, stealthy way.
2. v. To behave in a cowardly or servile manner.
3. v. To move, give, take, or put in a quiet, stealthy manner: sneak candy into one's mouth; sneaked a look at the grade sheet.
4. n. A person regarded as stealthy, cowardly, or underhanded.
5. n. An instance of sneaking; a quiet, stealthy movement.
6. n. Informal A sneaker.
7. adj. Carried out in a clandestine manner: sneak preparations for war.
8. adj. Perpetrated without warning: a sneak attack.

Century Dictionary and Cyclopedia

1. To creep or steal about privately; go furtively, as if afraid or ashamed to be seen; slink.
2. To behave with meanness and servility; crouch; truckle.
3. To steal; pilfer. See sneak-thief.
4. To hide; conceal in a furtive or cowardly manner.
5. n. A mean, contemptible fellow; one who has recourse to mean and cowardly methods; a person of selfish and cowardly temper and conduct.
6. n. A petty thief. See sneak-thief and area-sneak.
7. n. In cricket, a ball bowled along the ground; a grub.
8. n. In whist, a singleton lead.

Wiktionary

1. n. A mean, sneaking fellow.
2. n. An informer; a tell-tale; a grass.
3. n. obsolete , (cricket) A ball bowled so as to roll along the ground; a daisy-cutter
4. v. To creep or steal (away or about) privately; to come or go meanly, as a person afraid or ashamed to be seen;
5. v. To hide, especially in a mean or cowardly manner.
6. v. informal To inform an authority about another's misdemeanours; to tell tales; to grass.

GNU Webster's 1913

1. v. To creep or steal (away or about) privately; to come or go meanly, as a person afraid or ashamed to be seen.
2. v. To act in a stealthy and cowardly manner; to behave with meanness and servility; to crouch.
3. v. obsolete To hide, esp. in a mean or cowardly manner.
4. n. A mean, sneaking fellow.
5. n. (Cricket), Cant A ball bowled so as to roll along the ground; -- called also grub.

WordNet 3.0

1. v. put, bring, or take in a secretive or furtive manner
2. adj. marked by quiet and caution and secrecy; taking pains to avoid being observed
3. v. to go stealthily or furtively
4. v. pass on stealthily
5. v. make off with belongings of others
6. n. someone acting as an informer or decoy for the police
7. n. someone who prowls or sneaks about; usually with unlawful intentions
8. n. a person who is regarded as underhanded and furtive and contemptible