relation in WordNet English dictionary

1. 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
   sexual intercourse  intercourse  sex act  copulation  coitus  coition  sexual congress  congress  sexual relation  relation  carnal knowledge 
   
2. an act of narration
   "he was the hero according to his own relation"; "his endless recounting of the incident eventually became unbearable"
   relation  telling  recounting 
   
3. an abstraction belonging to or characteristic of two entities or parts together
   relation 
   
4. (usually plural) mutual dealings or connections among persons or groups
   "international relations"
   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 amended complaint to the time the initial complaint was filed"
   relation back  relation 
   
6. a person related by blood or marriage
   "police are searching for relatives of the deceased"; "he has distant relations back in New Jersey"
   relative  relation