• In mathematics, a relation is a generalization of arithmetic relations, such as "=" and "<", that occur in statements, such as "5 < 6" and "2 + 2 = 4". See also binary relation, triadic relation, relational algebra, theory of relations.

• In relational modeling, a relation is a set of tuples, otherwise known as a table.

• In logic and philosophy, a relation is a property or predicate ranging over more than one argument.

• Relationship, Interpersonal relationship

Data modeling

Релация | Relace | Verhältnis | Relación | Relation | Relato | Relazione | Viszony | Verhouding | Отношение