1. A zodiacal constellation in the southern hemisphere; between Capricornus and Pisces.
2. The eleventh sign of the zodiac; the sun is in this sign from January 20 to February 18; Also called: Aquarius the Water Bearer.
Zodiacal constellation a little south of the celestial equator near Pegasus. Aquarius is represented as a man pouring water from a jar. The Sun passes through Aquarius from late Feb to early March. In astrology, the dates for Aquarius are between about 20 Jan and 18 Feb (see precession).