The tenth sign of the zodiac, used in astrology. The term is technical and primarily encountered in horoscopes or astrological contexts.
Capricorn is the zodiac sign from December 22 to January 19.
From Chinese 磨羯宮 (Mójiégōng), itself a transliteration of Sanskrit makara (a mythical sea creature) combined with 宮 (palace/sign). The term entered Japanese through Buddhist and astrological texts.