relation
noun
1.
an abstraction belonging to or characteristic of two entities or parts together
2.
sexual activity between individuals, especially the insertion of a man's penis into a woman's vagina until orgasm and ejaculation occur
3.
4.
5.
(law) the principle that an act done at a later time is deemed by law to have occurred at an earlier time
6.
(usually plural) mutual dealings or connections among persons or groups