/ Dictionary / Index C collateralize: Meaning and Definition of Find definitions for: col•lat•er•al•ize Pronunciation: (ku-lat'ur-u-līz"), [key] — -ized, -iz•ing. to secure (a loan) with collateral. to pledge (property, securities, etc.) as collateral. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: collateralize (Thesaurus) collateral damage collation Related Content Daily Word Quiz: arboreal Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language