Wordnet 3.0
NOUN (1)
1. 
 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: Passeriformes, order Passeriformes]
WordNet (r) 3.0 (2006):
order Passeriformes
    n 1: 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:
         Passeriformes, order Passeriformes]