Traditional Marriage Meaning

Example: Used other than as an idiom: see traditional,‎ marriage.
1993, Kenya National Assembly Official Record (Hansard), page 2661:
  The third set is the African traditional marriage as well as the Islamic marriage and the Hindu marriage. This is considered to be a potentially polygamous marriage.
1974, Edmund Ilogu, Christianity and Ibo culture, page 220:
  A great deal has been written about polygamy as a traditional marriage system in all Africa of which Iboland is a part.
Specifically, a heterosexual union; a social or legal union between two people of opposite sex.