/ Dictionary / Index I insessorial: Meaning and Definition of Find definitions for: in•ses•so•ri•al Pronunciation: (in"su-sôr'ē-ul, -sōr'-), [key] — adj. adapted for perching, as a bird's foot. habitually perching, as a bird. of or pertaining to birds that perch. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. in-service inset 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