pro1 / prō/ • n. (pl. pros) inf. a professional, esp. in sports: a tennis pro. • adj. (of a person or an event) professional: a pro golfer. pro2 • n. (pl. pros) (usu. pros) an advantage of something or an argument in favor of a course of action: the pros and cons of joint ownership. • prep. & adv. in favor of: [as prep.] they were pro the virtues of individualism.
PRO • abbr. ∎ public relations officer. ∎ Brit. Public Record Office.