/ Dictionary / Index A annular: Meaning and Definition of Find definitions for: an•nu•lar Pronunciation: (an'yu-lur), [key] — adj. having the form of a ring. (of a carpenter's nail) having a series of concentric grooves to improve holding power. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: annular (Thesaurus) annul annular clock Related Content Daily Word Quiz: cautious Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language