Meaning

• A silent person; a person who does not talk.

• An unintelligent person.

  "Don't be such a dummy!"

• A figure of a person or animal used by a ventriloquist; a puppet.

• Something constructed with the size and form of a human, to be used in place of a person.

  "To understand the effects of the accident, we dropped a dummy from the rooftop."

• A person who is the mere tool of another; a man of straw.

• A deliberately nonfunctional device or tool used in place of a functional one.

  "The hammer and drill in the display are dummies."

• A "dummy teat"; a plastic or rubber teat used to soothe or comfort a baby; a pacifier.

  "The baby wants her dummy."

• A player whose hand is shown and is to be played from by another player.

• A word serving only to make a construction grammatical.

  "The pronoun "it" in "It's a mystery why this happened" is a dummy."

• An unused parameter or value.

  "If flag1 is false, the other parameters are dummies."

• A feigned pass or kick or play in order to deceive an opponent.

• A bodily gesture meant to fool an opposing player; a feint.

Meaning

• To make a mock-up or prototype version of something, without some or all off its intended functionality.

  "The carpenters dummied some props for the rehearsals."

• To feint.