/ Dictionary / Index C customize: Meaning and Definition of Find definitions for: cus•tom•ize Pronunciation: (kus'tu-mīz"), [key] — -ized, -iz•ing. to modify or build according to individual or personal specifications or preference: to customize an automobile. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: customize (Thesaurus) custom house custom-made Related Content Daily Word Quiz: labyrinth Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language