/ Dictionary / Index O occas.: Meaning and Definition of Find definitions for: occas. Pronunciation: [key] occasional. occasionally. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. Occam's razor occasion 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