1.an abstraction belonging to or characteristic of two entities or parts together
2.the act of sexual procreation between a man and a woman; the man's penis is inserted into the woman's vagina and excited until orgasm and ejaculation occur
3.a person related by blood or marriage;
police are searching for relatives of the deceased
4.an act of narration;
he was the hero according to his own relation
5.(law) the principle that an act done at a later time is deemed by law to have occurred at an earlier time;
his attorney argued for the relation back of the ammended complaint to the time the initial complaint was filed
6.(usually plural) mutual dealings or connections among persons or groups;
international relations