1. a model of a human figure, especially one used to display clothes
2. a pacifier for a baby
Usage: British
3. a person who lacks intelligence or acts foolishly
Usage: informal

1. fake or imitation; not real or functional

Examples

• The store window featured several dummies wearing the latest fashions.
• The baby stopped crying when given her dummy.
• Don’t be such a dummy – read the instructions first.
• They used a dummy grenade for the training exercise.
• The dummy door was just painted on the wall.
• Police set up a dummy checkpoint to catch speeders.
• The crash test dummy helped engineers improve car safety.