Resembling or related to a sparrow; of or pertaining to the Passerinæ, in any sense, or the Passeres; passeriform.About as large as a sparrow: as, the passerine parrot, Psittacula passerina; the passerine ground-dove, Chamæpelia passerina; the passerine owl, Glaucidium passerinum. Also passeroid.n. A member of the Passerinæ, Passeres, or Passeriformes.