custodian

1 a person who takes care of a property sometimes for an absent owner the custodian made his usual rounds of the building to make sure that everything was OK Synonyms caretaker, guardian, janitor, keeper, warden, watchman Related Words cocurator, curator; sexton, steward

2 a person or group that watches over someone or something served as custodian of the prisoner until he could be turned over to federal authorities Synonyms guard, guardian, keeper, lookout, minder, picket, sentinel, sentry, warden, warder, watch, watcher, watchmanRelated Words observer, patrol, spotter, surveillant, watchdog; bodyguard, convoy, defender, escort, honor guard; gatekeeper; hack [slang]

3 someone that protects we must regard ourselves as custodians of the Earth so that its natural resources may be enjoyed by many generations to come Synonyms protector, defender, guard, guardian, guardian angel, protectionRelated Words bodyguard, champion; lookout, sentinel, sentry, warden, warder, watch, watchdog, watchman; conserver, harborer, keeper, preserver, saver