Persons of the same blood or members of the same family.
Biological family; used interchangeably with "relative." At times, kin is used more broadly to include other persons with a close relationship to the family.
Refers to animals within the same Family - for example; ring-tailed lemurs and black lemurs are both within the Family: Lemuridae, therefore are Kin. Generally speaking, only those sharing the same Kinship groups can hybridise.