The collective group of one's cousins; all the cousins within a family considered as a unit or kinship group.
From 'cousin' + '-ry' (collective suffix, as in 'archery' or 'cavalry'), creating a noun that refers to cousins as a collective body or social group.
The '-ry' suffix originally meant 'men who do something'—so 'cousinry' literally suggested 'cousin-people,' showing how Middle English used suffixes very differently than modern English does.
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