relation

(rĭ-lāˈshən)

1. A logical or natural association between two or more things; relevance of one to another; connection: the relation between smoking and heart disease.
2. The connection of people by blood or marriage; kinship.
3. A person connected to another by blood or marriage; a relative.
4. The way in which one person or thing is connected with another: the relation of parent to child.
5. relations
   a. The mutual dealings or connections of persons, groups, or nations in social, business, or diplomatic matters: international relations.
   b. Sexual intercourse.
6. Reference; regard: in relation to your inquiry.
7. a. The act of telling or narrating.
   b. A narrative; an account.
8. Law The principle whereby an act done at a later date is considered to have been done on a prior date.