That is called an ASTERISM. (For a somewhat related concept, see also: CONSTELLATION)
A constellation. (Also an asterism does this.)
A group of stars that suggests a pattern is a constellation, but the picture is strictly in the mind of the viewer.
A group of stars that form a picture (at least in human eyes) is known as a constellation.
An Asterism.
a constellation is a group of stars that from a picture
a constellation
A group of stars that form a picture is called a constellation. These patterns are recognized and named by different cultures around the world.
Constellation
A group of stars that forms a recognizable pattern in the sky is called a constellation. Constellations are used in astronomy for navigation and to identify specific stars and celestial events. They often have historical or mythological significance, with many cultures creating their own interpretations of these star patterns.
The Big Dipper is simply a group of stars, that happen to be fairly bright, and more or less in the same direction. If you see a "constellation" - a group of stars that forms some picture - that doesn't necessarily mean the stars are related to one another. It is likely that some of the stars are several times farther away than others.
A constellation is a group of stars that make a picture like The Big Dipper.
An asterism.