1. Someone who entices or lures another person or thing, as into danger, a trap, etc.
2. Anything used as a lure.
3. A trained bird or other animal used to entice game into a trap or within gunshot.
4. An artificial bird, as a painted wooden duck, used to lure other water ducks, etc., close enough to be shot.
5. A pond into which wild fowl are lured for capture.
6. An object capable of reflecting radar waves, used as a spurious aircraft, missile, chaff, etc., for the deception of radar detectors.