0 a northern constellation (= a group of stars) said to represent twins (= two brothers or sisters born together): --
It was interesting to discover that the sales department contained a high proportion of those born under the sign of Gemini.
1 the third sign of the zodiac, covering the period May 21 to June 21 and represented by twins, or a person born during this period --
Harvey is the same sign as me: Gemini.
He was a Gemini, a man with two faces.
Saturn lies in Gemini south of the two bright stars Castor and Pollux.
Geminid meteors appear to radiate from the constellation Gemini, the Twins.