female goat
"The nanny stayed by her kids while they played in the meadow."
A child's nurse.
"The nanny arrived at eight to feed and change the twins before their father got home from work."
To serve as a nanny.
"She decided to take a job in London to serve as a nanny for a wealthy family's twins."
A diminutive of the female given names Ann or Anne.
"The old-fashioned nanny on her letterhead was actually just a nickname for her friend, Ann."
The word "nanny" combines the root nan, meaning grandmother or nursemaid, with the suffix -y. This term likely traveled into English from Celtic languages where it originally referred to a grandparent.