sibling-in-law

noun

The sibling of one's spouse.

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sib-in-law
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Meanings

nounsibling-in-law (plural siblings-in-law)

plural siblings-in-law · alternative sibling 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. Co-sibling-in-law: A relative of one's generation, separated by two degrees of marriage:
    1. uncommonThe spouse of the sibling of one's spouse.
    2. uncommonThe sibling of the spouse of one's sibling.

Synonyms & antonyms

Similar
sib-in-law
Narrower
brother-in-lawsister-in-law

Origin

From sibling + -in-law.

Full word history & related roots →

Translations

Danish svigersøskende
  • svigersøskendesibling-in-law
Dutch schoonbrus
  • schoonbrussibling-in-law
German Schwiegergeschwister
  • Schwiegergeschwistersibling-in-law
Norwegian Bokmål svigersøsken
  • svigersøskensibling-in-law
Polish rodzeństwo małżonka
  • rodzeństwo małżonkasibling-in-law
Swedish svärsyskon
  • svärsyskonsibling-in-law
Cite this entry
APA

sibling-in-law. (n.d.). In WatkinsX Dictionary. Retrieved November 4, 2026, from https://dictionary.watkinsx.com/word/sibling-in-law

MLA

“sibling-in-law.” WatkinsX Dictionary, https://dictionary.watkinsx.com/word/sibling-in-law. Accessed November 4, 2026.

Chicago

WatkinsX Dictionary, s.v. “sibling-in-law,” accessed November 4, 2026, https://dictionary.watkinsx.com/word/sibling-in-law.

Source: sibling-in-law on Wiktionary, CC BY-SA 4.0.