(1):

(n.) A female servant.

(2):

(n.) An unmarried woman; usually, a young unmarried woman; esp., a girl; a virgin; a maiden.

(3):

(n.) A man who has not had sexual intercourse.

(4):

(n.) The female of a ray or skate, esp. of the gray skate (Raia batis), and of the thornback (R. clavata).