Friend-in-law

noun

noun ·Rare ·Advanced level

Definitions

Noun
  1. 1
    A friend by association rather than choice, such as the friend of a partner, spouse or other friend; an acquaintance. humorous

Etymology

From friend + -in-law, by analogy with mother-in-law, father-in-law, sister-in-law, brother-in-law, etc.

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