Dictionary

co-aunt en · NOUN

Etymology

* co- + aunt

Meanings

1. of a woman, an aunt of one's niece or nephew who is not one's sister; a co-sister-in-law as common aunt to the children of two women's married siblings.
2. a woman's sister, as aunt in common to the children of a third sibling
   • A few years ago, my sister and co-aunt Judy started flying [our niece and nephew] Violet and Dash down to California to spend a week with her 2008 August 4, “Camp Jean”, in The Favorite Aunt: Not that it’s a competition, archived from the original on 24 Mar 2009:

Forms

Coordinates

co-uncle

Relateds

co-grandmother

Synonyms

co-sister-in-law (sibling's spouse's sister)