/ Dictionary / Index I irrotational: Meaning and Definition of Find definitions for: ir•ro•ta•tion•al Pronunciation: (ir"ō-tā'shu-nl), [key] — adj. not having rotation. conservative (def. 7). Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. irrorate irrupt Related Content Daily Word Quiz: acquiesce Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language