Definition of: sneak

(snēk) v.i.
1. To move or go in a stealthy manner.
2. To act with covert cowardice or servility.
—v.t.
3. To put, give, transfer, move, etc., secretly or stealthily.
4. Colloq. To pilfer.
—noun
1. One who sneaks; a mean, cowardly fellow.
2. plural Colloq. Sneakers.
3. A stealthy movement.
—adjective Stealthy; covert: a sneak attack. [Akin to OE snīcan creep]