an abdominal muscle —usually used in plural. about. the 11th month of the civil year or the 5th month of the ecclesiastical year in the Jewish calendar. the one of the four ABO blood groups characterized by the presence of antigens designated by the letters A and B and by the absence of antibodies against these antigens. able seaman; able-bodied seaman. abort; abortion. airborne. airman basic. Alberta. [New Latin artium baccalaureus] bachelor of arts. from: away: off.