See also: sibling in law

English edit

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Etymology edit

From sibling +‎ -in-law.

Noun edit

sibling-in-law (plural siblings-in-law)

  1. A relative of one's generation, separated by one degree of marriage:
    1. The sibling of one's spouse.
    2. The spouse of one's sibling.
  2. (uncommon) Co-sibling-in-law: A relative of one's generation, separated by two degrees of marriage:
    1. The spouse of the sibling of one's spouse.
    2. The sibling of the spouse of one's sibling.

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