dummy

Have you ever seen an entertainer make a doll look like it’s talking? The entertainer is using a dummy — a doll made to look like a person.

A dummy is a type of doll that looks like a person. Entertainers called ventriloquists can make dummies appear to talk. The automobile industry uses dummies in cars to study how safe cars are during a crash. A dummy can also be anything that looks real but doesn’t work: a fake. Actors in a play might use certain props that are dummies, such as a dummy laptop. Dummy is also an insult used to mean “an ignorant person.”

Definitions of dummy
1

n a figure representing the human form

Types:
lay figure
dummy in the form of an artist's jointed model of the human body
form, manakin, manikin, mannequin, mannikin
a life-size dummy used to display clothes
ventriloquist's dummy
a wooden dummy into which a ventriloquist projects the voice
Type of:
figure
a model of a bodily form (especially of a person)

n an ignorant or foolish person

Synonyms:
boob, booby, dope, dumbbell, pinhead
Type of:
simple, simpleton
a person lacking intelligence or common sense

n a person who does not talk

Synonyms:
silent person
Type of:
deaf-and-dumb person, deaf-mute, mute
a deaf person who is unable to speak

n a cartridge containing an explosive charge but no bullet

Synonyms:
blank, blank shell
Type of:
cartridge
ammunition consisting of a cylindrical casing containing an explosive charge and a bullet; fired from a rifle or handgun

adj having the appearance of being real but lacking capacity to function

“a dummy corporation”
Synonyms:
artificial, unreal
contrived by art rather than nature

v make a dummy of

dummy up the books that are to be published”
Synonyms:
dummy up
Type of:
create, make, produce
create or manufacture a man-made product

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