Kinship generally refers to a biological and/or familial relationship between two organisms; however, it can be more broadly used to refer to any emotional relationship.

Logically, this can also refer to ideas which are mathematically related.

In its most general sense, kinship can be used in reference to similarity; for instance, a car is akin to a truck. In some cultures, the formal establishment of kinship involves various customs and obligations.

See also: