Noun | 1. | ![]() animal order - the order of animals order Passeriformes, Passeriformes - 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 family Menuridae, Menuridae - lyrebirds Atrichornithidae, family Atrichornithidae - scrubbirds |