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1. A child of one's aunt or uncle. Also called first cousin.
2. A relative descended from a common ancestor, such as a grandparent, by two or more steps in a diverging line.
3. A relative by blood or marriage; a kinsman or kinswoman.
4. A member of a kindred group or country: our Canadian cousins.
5. Something similar in quality or character: "There's no mistaking soca for its distant Jamaican cousin, reggae" (Michael Saunders).
6. Used as a form of address by a sovereign in addressing another sovereign or a high-ranking member of the nobility.
[Middle English cosin, a relative, from Old French, from Latin cōnsōbrīnus, cousin : com-, com- + sōbrīnus, cousin on the mother's side; see swesor- in Indo-European roots.]
adj → verwandtschaftlich