/ Dictionary / Index P passerine: Meaning and Definition of Find definitions for: pas•ser•ine Pronunciation: (pas'ur-in, -u-rīn", -u-rēn"), [key] — adj. of, belonging, or pertaining to the order Passeriformes, comprising more than half of all birds and typically having the feet adapted for perching. oscine (def. 1). —n. any bird of the order Passeriformes. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: passerine (Thesaurus) passeriform pas seul 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