Word.ws English Dictionary

sister-out-law

sister-out-law noun: the sister of one's boyfriend or girlfriend.

Noun

sister-out-law (plural sisters-out-law)

  1. The sister of one's boyfriend or girlfriend.
  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.)2008, John Crawley, Among the Aspen, →ISBN, TDrcNfNKVH4C, page 114
    • This included Prunella Tuff, my “sister-out-law”, a term we invented to describe the relationship between us as she was the sister of my brother in-law, Tim Tuff.2013, Howard Balloch, Semi-Nomadic Anecdotes (Biography & Autobiography), →ISBN, jwc6BgAAQBAJ, page 59
  3. The sister of one's ex-spouse.

Forms of sister-out-law

pluralsisters-out-law

Origin of sister-out-law

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

Questions about sister-out-law

What does sister-out-law mean?
Sister-out-law means the sister of one's boyfriend or girlfriend.
What part of speech is sister-out-law?
Sister-out-law is a noun.
What is the plural of sister-out-law?
The plural of sister-out-law is sisters-out-law.

Words near sister-out-law in the dictionary

  1. sister's threads
  2. sister-german
  3. sister-in-arms
  4. sister-in-law
  5. sister-in-laws
  6. sister-out-law
  7. sister-wife
  8. sister-wives
  9. sistercest
  10. sistercon
  11. sistercons

Source and license

Adapted from Wiktionary: sister-out-law (page history and authors). Text available under the Creative Commons Attribution-ShareAlike 4.0 license. Word.ws reformatted the entry and added links. Wiktionary data of 2026-09-02.

Last updated:

Cite this entry: “sister-out-law.” Word.ws, https://word.ws/sister-out-law. Based on Wiktionary, CC BY-SA 4.0.