1. a trap for mice, esp. one consisting of a rectangular wooden base on which a metal spring is mounted. 2. a device, machine, or the like whose structure or function suggests a trap for mice. 3. a device, system, or stratagem for detecting and catching someone in an unauthorized or illegal act. 4. Football.trap1 (def. 11). 5. build a better mousetrap, to make or offer a superior product.—v.t. 1. Informal. a. to trap or snare: traffic cops mousetrapping drunken drivers. b. to manipulate by devious or clever means; trick or outwit: to mousetrap the witness into a contradiction. 2. Football.trap1 (def. 20).
