English

Noun

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

1. (rare) One's spouse's sibling's spouse.

   (in the plural) The relationship between people who marry siblings.

2. (rare) One's sibling's spouse's sibling.

   (in the plural) The relationship between people whose siblings marry each other.

Coordinate terms

• co-brother-in-law
• co-sister-in-law

Related terms

• co-in-law
• co-parents-in-law

Translations

Languages which have words for this relationship which are distinct from the word for sibling-in-law. Not all are attested to have the second meaning above, though this may sometimes be an oversight: