noun

• (historical) A Roman unit of mass, usually equivalent to 327 g.
• (historical) A traditional Spanish unit of mass, usually around 460 g.
• (historical) A traditional Portuguese unit of mass, usually equivalent to 345 g and particularly used for trade in medicines.
• (historical) Synonym of arratel, a separate Portuguese unit of mass, usually around 460 g.
• (historical) Synonym of pound, a notional pound of silver as a money of account, especially in medieval contexts.
• (astronomy) A constellation of the zodiac, supposedly shaped like a set of scales.
• (astrology) The astrological sign for the scales, ruled by Venus and covering September 24 - October 23 (tropical astrology) or October 16 - November 16 (sidereal astrology).
• Someone with a Libra star sign
• (historical) Alternative spelling of libbra, a traditional Italian unit of mass.