[Astronomy] a large constellation (the Water Carrier or Water Bearer), said to represent a man pouring water from a jar. It contains no bright stars but has several planetary nebulae.
II. (as genitive Aquarii) — used with preceding letter or numeral to designate a star in this constellation • the star Alpha Aquarii.
[Astrology] the eleventh sign of the zodiac, which the sun enters about 21 January.
IV. ( an Aquarius) — a person born when the sun is in the sign of Aquarius. V. phrases Age of Aquarius an astrological age which is about to begin, marked by the precession of the vernal equinox into Aquarius, believed by some to herald worldwide peace and harmony.
– origin Latin aquarius ‘of water’, used as a noun to mean ‘water carrier’.