Li·bra / ˈlēbrə/ 1. Astron. a small constellation (the Scales or Balance), said to represent the balance that is the symbol of justice. It contains no bright stars. ∎  [as genitive] (Librae / -ˌbrī; -ˌbrē/ ) used with a preceding letter or numeral to designate a star in this constellation: the star Alpha Librae.2. Astrol. the seventh sign of the zodiac, which the sun enters at the northern autumnal equinox (about September 23). ∎  (a Libra) a person born when the sun is in this sign.DERIVATIVES: Li·bran n. & adj. (in sense 2).

li·bra / ˈlēbrə; ˈlī-/ • n. (pl. -brae / -ˌbrī; -ˌbrē/ ) (in ancient Rome) a unit of weight, equivalent to 12 ounces (0.34 kg). It was the forerunner of the pound.

Libra the seventh sign of the zodiac, the Scales or Balance, which the sun enters at the northern autumnal equinox (about 23 September).