Co-sibling-in-law Definition
noun
(rare) One's sibling's spouse's sibling.
(in the plural) The relationship between people whose siblings marry each other.
Wiktionary
Other Word Forms of Co-sibling-in-law
Noun
Singular:
co-sibling-in-law
Plural:
co-siblings-in-lawFind Similar Words
Find similar words to co-sibling-in-law using the buttons below.