From Longman Dictionary of Contemporary EnglishSagittariusSa‧git‧tar‧i‧us /ˌsædʒəˈteəriəs $ -ˈter-/ noun 1 [uncountable]ROA the ninth sign of the zodiac, represented by an animal that is half horse and half human, which some people believe affects the character and life of people born between November 23 and December 212 (also Sagittarian) [countable]ROA someone who was born between November 23 and December 21 —Sagittarian adjectiveOrigin Sagittarius (1300-1400) Latin “someone who shoots an arrow”, from sagitta “arrow”