/ Dictionary / Index C complexity: Meaning and Definition of Find definitions for: com•plex•i•ty Pronunciation: (kum-plek'si-tē), [key] — pl. -ties the state or quality of being complex; intricacy: the complexity of urban life. something complex: the complexities of foreign policy. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: complexity (Thesaurus) complexionless complex machine Related Content Daily Word Quiz: winsome Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language