/ Dictionary / Index C challenging: Meaning and Definition of Find definitions for: chal•leng•ing Pronunciation: (chal'in-jing), [key] — adj. offering a challenge; testing one's ability, endurance, etc: a challenging course; a challenging game. stimulating, interesting, and thought-provoking: a challenging suggestion. provocative; intriguing: a challenging smile. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: challenging (Thesaurus) challenger challis 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