A group of three (trinary) or more stars orbiting around each other because of their mutual gravitational attraction. Well known examples include the Alpha Centauri system and Castor.
[n] - a system of three or more stars associated by gravity
noun a system of three or more stars associated by gravity
A group of stars that orbit each other.
three or more stars lying close together in the celestial sphere and usually united in a single gravitational system.