/ Dictionary / Index C custodian: Meaning and Definition of Find definitions for: cus•to•di•an Pronunciation: (ku-stō'dē-un), [key] — n. a person who has custody; keeper; guardian. a person entrusted with guarding or maintaining a property; janitor. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: custodian (Thesaurus) custodial custody Related Content Daily Word Quiz: simian Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language