及物动词
1. 诱饵;诱惑物;用作诱饵的人
If you refer to something or someone as a decoy, you mean that they are intended to attract people's attention and deceive them, for example by leading them into a trap or away from a particular place.
2. (用于吸引野鸟的)假鸟
A decoy is a model of a bird that is used to attract wild birds towards it so that people can study them or shoot them.