concubinage

[ kon-kyoo-buh-nij, kong- ]

/ kɒnˈkyu bə nɪdʒ, kɒŋ- /

cohabitation of a man and woman without legal or formal marriage.

the state or practice of being a concubine.

Origin of concubinage

Middle English word dating back to 1350–1400; see origin at concubine, -age

Yet rampant corruption, entrenched patriarchy, and a long history of concubinage also play a role.

Inside China’s Mistress-Industrial Complex |Junheng Li, Bethany Allen, Ana Swanson |February 4, 2014 |DAILY BEAST
Polygamy or concubinage is rare: the adoption of children common.

The Natural History of the Varieties of Man |Robert Gordon Latham
It is to be regretted that the writer of the "Life of Mahomet" most absurdly confounds slavery and concubinage.

A Critical Exposition of the Popular 'Jihd' |Moulavi Gergh Ali
Concubinage conjointly with a wife, is altogether unlawful for Christians, and detestable.

The Delights of Wisdom Pertaining to Conjugial Love |Emanuel Swedenborg

As concubinage has been practiced from time immemorial, the heir, the oldest son, has not always been born of the empress.

The Old World and Its Ways |William Jennings Bryan
But, though polygamy and concubinage are seldom known in Java, their absence must not be considered as implying superior morality.

The History of Prostitution |William W. Sanger

concubinage

/ (kɒnˈkjuːbɪnɪdʒ) /

cohabitation without legal marriage

the state of living as a concubine