[n] an abstraction belonging to or characteristic of two entities or parts together
[n] (usually plural) mutual dealings or connections among persons or groups; "international relations"
[n] 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
[n] (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"
[n] an act of narration; "he was the hero according to his own relation"; "his endless recounting of the incident eventually became unbearable"
[n] a person related by blood or marriage; "police are searching for relatives of the deceased"; "he has distant relations back in New Jersey"