prop. n. The largest order of birds comprising about half the known species: rooks; finches; sparrows; tits; warblers; robins; wrens; swallows; etc.; in four suborders: Eurylaimi; Tyranni; Menurae; Oscines or Passeres. Syn. -- order Passeriformes. [ WordNet 1.5 ]
(n) largest order of birds comprising about half the known species; rooks; finches; sparrows; tits; warblers; robins; wrens; swallows; etc.; the four suborders are Eurylaimi and Tyranni and Menurae and Oscines or Passeres, Syn. order Passeriformes