What does "bird" mean?

Additional senses

1. 2.Specifically, among sportsmen, a game bird.
2. 3.Fig.: A girl; a maiden. And by my word! the bonny bird In danger shall not tarry. Campbell. Arabian bird, the phenix. -- Bird of Jove, the eagle. -- Bird of Juno, the peacock. -- Bird louse (Zoöl.), a wingless insect of the group Mallophaga, of which the genera and species are very numerous and mostly parasitic upon birds. -- Bird mite (Zoöl.), a small mite (genera Dermanyssus, Dermaleichus and allies) parasitic upon birds. The species are numerous. -- Bird of passage, a migratory bird. -- Bird spider (Zoöl.), a very large South American spider (Mygale avicularia). It is said sometimes to capture and kill small birds. -- Bird tick (Zoöl.), a dipterous insect parasitic upon birds (genus Ornithomyia, and allies), usually winged.
3. 4.To catch or shoot birds.
4. 5.Hence: To seek for game or plunder; to thieve. [R.] B. Jonson.