second cousinsecond cousin
- A child of a first cousin of one's parent.
- A child of one's first cousin; a first cousin once removed.
(plural second cousins)
- Starting with two second cousins (two persons with a common great-grandparent), the relationship between one of those persons and the offspring of the other is second cousin once removed. The relationship between one of those persons and the grandchild of the other is second cousin twice removed.