Sister-out-law

noun

noun ·Rare ·Advanced level

Definitions

Noun
  1. 1
    The sister of one's boyfriend or girlfriend.
  2. 2
    Girlfriend of one's brother or sister.

    "I, on the other side, was ready to strangle my almost sister-in-law. (My sister out-law.)"

  3. 3
    The sister of one's ex-spouse.

Example

More examples

"I, on the other side, was ready to strangle my almost sister-in-law. (My sister out-law.)"

Etymology

From sister + -out-law, by analogy to sister-in-law.

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Data sourced from Wiktionary, WordNet, CMU, and other open linguistic databases. Updated March 2026.