noun
something or someone used to lure, entice, or misdirect, as into danger or a trap, esp. an artificial bird or animal used to lure live birds or animals within gunshot or into a trap.
The criminals used one car as a decoy and another as the real getaway car.
transitive verb
to lure, entice, or misdirect, as into danger or a trap, with or as if with a decoy.
intransitive verb
to be lured, enticed, or misdirected by a decoy.