Open English Wordnet
Nouns
(n)secret agent, intelligence officer, intelligence agent, operativea person secretly employed in espionage for a government
(n)private detective, PI, private eye, private investigator, operative, shamus, sherlocksomeone who can be employed as a detective to collect information and assist in criminal investigations
Adjectives
(s)running, operative, functional, working(of e.g. a machine) performing or capable of performing“in running (or working) order”, “a functional set of brakes”
