Definition of unmatrimonial in US English:

unmatrimonial

adjective

  • Not matrimonial.

Origin

Late 16th century; earliest use found in Buchanan's Detectioun of Marie Quene of Scottes. From un- + matrimonial.

Pronunciation

unmatrimonial

/(ˌ)ʌnmatrɪˈməʊnɪəl/