Libra
Libra is a cardinal sign of the air element. In one phrase: weighing before choosing.
A sign on its own describes very little. What matters is which planet stands there, and in which house — Libra on your Moon and Libra on your Saturn describe two different people.
The zodiac used here is tropical: the circle is divided into twelve equal sectors of 30° measured from the spring equinox. It is a coordinate system, not a map of the constellations.
Build your chart to see whether anything of yours falls in Libra, and where.