From Longman Dictionary of Contemporary Englishguardian angelˌguardian ˈangel noun [countable] 1 Ra good spirit who is believed to protect a person or place2 PROTECTsomeone who helps or protects someone else when they are in trouble
Examples from the Corpus
guardian angel• Perhaps you have a guardian angel.• The knowledge of an empiricist's guardian angel would presumably be neither embodied nor built in.• The soul was accessible to the gaze of your guardian angel. 