- one of the twelve constellations along the apparent annual path of the sun in the sky.
- (in contemporary Western astrology) one of the twelve divisions of the sun's apparent annual path in the sky, each representing a constellation under which a person can be born and which is said to influence or correlate with certain aspects of their life, personality, etc.
- any of the 12 equal areas, 30° wide, into which the zodiac can be divided, named after the 12 zodiacal constellations. In astrology, it is thought that a person's psychological type and attitudes to life can be correlated with the sign in which the sun lay at the moment of his birth, with the ascendant sign, and to a lesser extent with the signs in which other planets lay at this time
