not engaged on either side; not taking part with or assisting either of two or more contending parties; neuter; indifferent.-neither good nor bad; of medium quality; middling; not decided or pronounced.-neuter. see neuter, a., 3.-having neither acid nor basic properties; unable to turn red litmus blue or blue litmus red; -- said of certain salts or other compounds. contrasted with acid, and alkaline.-a person or a nation that takes no part in a contest between others; one who is neutral.