noun (n)

• an abstraction belonging to or characteristic of two entities or parts together(noun.tops)

  source: wordnet30
• 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(noun.act)

  Synonym:
  carnal knowledge, coition, coitus, congress, copulation, intercourse, sex act, sexual congress, sexual intercourse, sexual relation
  

  source: wordnet30
• a person related by blood or marriage(noun.person)

  Example:
  He has distant relations back in New Jersey.
  

  Synonym:
  relative
  

  source: wordnet30
• an act of narration(noun.communication)

  Example:
  He was the hero according to his own relation.
  

  Synonym:
  recounting, telling
  

  source: wordnet30
• (law) the principle that an act done at a later time is deemed by law to have occurred at an earlier time(noun.cognition)

  Example:
  His attorney argued for the relation back of the amended complaint to the time the initial complaint was filed.
  

  Synonym:
  relation back
  

  source: wordnet30
• (usually plural) mutual dealings or connections among persons or groups(noun.act)

  Example:
  International relations.
  

  source: wordnet30
• The act of relating or telling; also, that which is related; recital; account; narration; narrative; as, the relation of historical events.(noun)

  source: webster1913