Sagittarian UK /ˌsadʒɪˈtɛəɹi.ən/US /ˌsædʒəˈtɛɹi.ən/adjective 1noun 1forms 1 adjective1 •Of, or pertaining to, the Sagittarius star sign. noun1 •Someone with the Sagittarius star sign.Thus I read in the newsprints that "fortune" favors Scorpions this month but extravagance and rashness should be avoided Aquarians and Sagittarians should live quietly. — 1947 formsSagittarians