/ Dictionary / Index O obstacle: Meaning and Definition of Find definitions for: ob•sta•cle Pronunciation: (ob'stu-kul), [key] — n. something that obstructs or hinders progress. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: obstacle (Thesaurus) obsolete obstacle course Related Content Daily Word Quiz: ontiguous Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language