/ Dictionary / Index O orbital: Meaning and Definition of Find definitions for: or•bit•al Pronunciation: (ôr'bi-tl), [key] — adj. of or pertaining to an orbit. —n. a wave function describing the state of a single electron in an atom(atomic orbital)or in a molecule(molecular orbital). the electron in that state. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: orbital (Thesaurus) orbit orbital angular momentum Related Content Daily Word Quiz: rustic Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language