Having served out one's time; having done sufficient service; discharged with honor from the performance of public duty on account of infirmity, age, or long service, but retained on the rolls: as, a professor emeritus; a rector emeritus.n. In Roman history, a soldier or public functionary who had served out his time and retired from service. Such servants were entitled to some remuneration answering to modern half pay.n. One who has served out his time or done sufficient service; one who has been honorably discharged from public service or from a public office, as an officer in a university or college, usually with continuance of full or partial emolument.