relations

noun

• The manner in which two things may be associated.

  "The relation between diet and health is complex."

• A member of one's family.

  "Yes, he's a relation of mine, but only a distant one."

• The act of relating a story.

  "Your relation of the events is different from mine."

• A set of ordered tuples.
• Specifically, a set of ordered pairs.

  "Equality is a symmetric relation, while divisibility is not."

• A set of ordered tuples retrievable by a relational database; a table.

  "This relation uses the customer's social security number as a key."

• A statement of equality of two products of generators, used in the presentation of a group.
• A subobject of a product of objects.
• (usually collocated: sexual relation) The act of intercourse.