aunt, auntie, aunty (noun)
the sister of your father or mother; the wife of your uncle
a sister or sister-in-law of someone's parent
(also great-aunt or grandaunt) a person's grandparent's sister or sister-in-law.
(usually auntie) a grandmother.
an affectionate term for a woman of an older generation than oneself, especially a friend of one's parents, by means of fictive kin.
An aunt is a person who is the sister or sister-in-law of a parent. A great-aunt is the sister or sister-in-law of a grandparent. The male equivalent of an aunt is an uncle, and the reciprocal relationship is that of a nephew or niece. "Aunt" may also be an honorific bestowed upon an individual of fictive kinship.