What is the meaning of Dummy?

A silent person; a person who does not talk.

A stupid person.

A term of address.

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.

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.

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

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

A word serving only to make a construction grammatical.

An unused parameter or value.

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

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

A newborn animal that is indifferent to stimulus and does not voluntarily move.

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

To feint.

Extremely.

Source: wiktionary.org