Niece vs. Aunt — What's the Difference?

The daughter of one's brother or sister or of the brother or sister of one's spouse.

An aunt is a woman who is a sibling of a parent or married to a sibling of a parent. Aunts who are related by birth are second-degree relatives.

A daughter of one’s sibling, brother-in-law, or sister-in-law; either the daughter of one's brother ("fraternal niece"), or of one's sister ("sororal niece").

The sister of one's father or mother.

A relative, in general; especially, a descendant, whether male or female; a granddaughter or a grandson.

The wife of a sibling of one's mother or father.

A daughter of one's brother or sister, or of one's brother-in-law or sister-in-law. In modern English, this is the primary meaning.

Used as a form of address for an older woman, especially by children.

A daughter of your brother or sister

The sister or sister-in-law of one’s parent.

The female cousin or cousin-in-law of one’s parent.

(affectionate) A woman of an older generation than oneself, especially a friend of one's parents, by means of fictive kin.

(obsolete) Any elderly woman.

(obsolete) A procuress or bawd.

The sister of one's father or mother; - correlative to nephew or niece. Also applied to an uncle's wife.

An old woman; and old gossip.

A bawd, or a prostitute.

The sister of your father or mother; the wife of your uncle