Aquarius the Water Bearer aqua·riust·he·waterbearer uncommon noun 1. the eleventh sign of the zodiac; the sun is in this sign from about January 20 to February 18 SynonymsAquariusAquarius the Water BearerWater Bearer Related words Broader terms sign of the zodiac WordNet 2.1 (Princeton University). WordNet 2.1 Copyright Princeton University. All rights reserved.