(1):

(n.) A goddess of the mountains, forests, meadows, or waters.

(2):

(n.) Any one of a subfamily (Najades) of butterflies including the purples, the fritillaries, the peacock butterfly, etc.; - called also naiad.

(3):

(n.) A lovely young girl; a maiden; a damsel.

(4):

(n.) The pupa of an insect; a chrysalis.