1. In astrology, the tenth sign of the zodiac: Capricorn is represented by a goat with a fish's tail and out extends from December 22 to January 19.

Capricorn is classified as an earth sign, and its ruling planet is Saturn.

2. In astronomy, a faint zodiacal constellation in the equatorial region of the southern hemisphere: In school Christaine learned that Capricorn was situated between Aquarius and Sagittarius.

The parallel line of latitude 23° 27': The Tropic of Capricorn lies south of the equator, the southern boundary of the Torrid Zone, and the most southerly latitude at which the sun can shine directly overhead (at the December solstice).