/ Dictionary / Index A angle of roll: Meaning and Definition of Find definitions for: an'gle of roll' Pronunciation: [key] — Aeron. Aeron. the acute angle between the lateral axis of an aircraft or spacecraft and a horizontal plane. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. angle of repose angle of slide Related Content Daily Word Quiz: topography Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language