Definition of unmarriage in English:

unmarriage

Pronunciation /(ˌ)ʌnˈmarɪdʒ/

noun

  • 1The state, fact, or condition of being unmarried; lack of marriage.

    In recent use sometimes with reference to relationships or partnerships resembling but not formally constituting marriage.

  • 2As a count noun: a relationship or partnership resembling but not formally constituting a marriage.

Origin

Mid 19th century; earliest use found in The Lancet. From un- + marriage.