Breadcrumb Home > Dictionary > Index A Apollo asteroid: Meaning and Definition of Find definitions for: Apol'lo as"teroid Pronunciation: [key] — Astron. Astron. one of a number of asteroids whose orbits cross that of the earth. Cf. Amor asteroid, Aten asteroid. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. Apollo Apollo Belvedere ✖ Related Content Daily Word Quiz: dubitable Analogy of the Day: Today’s Analogy Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language