Noun
The cohabiting of a man and a woman who are not legally married; the state of being a concubine.
A plea, in which it is alleged that the woman suing for dower was not lawfully married to the man in whose lands she seeks to be endowed, but that she was his concubine.
Source: Webster's dictionaryAt this time there were a range of spousal relationships, from outright concubinage to fully recognised, church-sanctioned marriages. Source: Internet
It solemnly confirmed the Concordat and passed several disciplinary decrees, such as those against simony and concubinage among the clergy. Source: Internet
Although sometimes the two are confused, mut'ah is not concubinage. Source: Internet
Here, the Church dealt with issues of simony, concubinage of the clergy. Source: Internet
Historically, concubinage was frequently entered into voluntarily (by the woman or her family) as it provided a measure of economic security for the woman involved. Source: Internet
Maimonides was not the first Jewish thinker to criticise concubinage. Source: Internet