An uncle.
Friend.
A member of one's extended family; a relative.
The manner in which two things may be associated.
A set of ordered tuples.
A set of ordered tuples retrievable by a relational database; a table.
The act of intercourse.
Specifically, a set of ordered pairs; a binary relation.
The act of relating a story.
A statement of equality of two products of generators, used in the presentation of a group.
A subobject of a product of objects.