/ Dictionary / Index O Orionids: Meaning and Definition of Find definitions for: O•ri•o•nids Pronunciation: (u-rī'u-nidz, ôr"ē-ō'-, ōr"-), [key] — n. (used with a pl. v.) Astron. a collection of meteors comprising a meteor showervisible during October, and having its apparent origin in the constellation Orion. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. Orion Orion Nebula Related Content Daily Word Quiz: cygnet Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language