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From co- +‎ parent-in-law or co-parent +‎ -in-law.


co-parent-in-law (plural co-parents-in-law)

  1. A parent of one's son- or daughter-in-law, that is, a parent-in-law of one's son or daughter.
    • 1995, Janet Carsten, Stephen Hugh-Jones, About the house: Lévi-Strauss and beyond, pages 120, 132:
      the relation between co-parents-in-law focuses on the production of grandchildren [] the relation between co-parents-in-law as stabilized through shared grandchildren

Usage notes[edit]

  • Rare in conversation, especially in the singular form, the generic "in-laws" is generally used, with context left to disambiguate. If grandchildren are born, the term co-grandparents may be used if the focus is on the relationship through the grandchildren rather than though the married couple.


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