'Sneaker' definitions:

Definition of 'sneaker'

From: WordNet
noun
A canvas shoe with a pliable rubber sole [syn: gym shoe, sneaker, tennis shoe]
noun
Someone acting as an informer or decoy for the police [syn: fink, snitch, snitcher, stoolpigeon, stool pigeon, stoolie, sneak, sneaker, canary]

Definition of 'Sneaker'

From: GCIDE
  • Sneaker \Sneak"er\ (sn[=e]k"[~e]r), n.
  • 1. One who sneaks. --Lamb. [1913 Webster]
  • 2. A vessel of drink. [Prov. Eng.] [1913 Webster]
  • A sneaker of five gallons. --Spectator. [1913 Webster]
  • 3. A type of soft shoe with a flat, pliable, typically rubber or other soft sole, and canvas-like upper, used in sports such as tennis, or for comfort. Called sneaker because they give no warning of one's approach. Usually used in the pl. [Webster 1913 Suppl. +PJC]
  • 4. A punch bowl. [Obs.] --Spectator. [Webster 1913 Suppl.]