co-aunt

  1. Noun.  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. Noun.  a woman's sister, as aunt in common to the children of a third sibling.

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This entry was last updated on RefTopia from its source on 3/20/2012.