American Heritage Dictionary
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Century Dictionary
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GNU Webster's 1913
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WordNet
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Elsewhere on the web
"The position a wife holds towards a concubine is the same as that of— Japan: an Attempt at Interpretation
At the audiences, this concubine was always in company with the Empress— Court Life in China
Rome, the concubine was accepted and never despised (R.B. Holt,— Studies in the Psychology of Sex, Volume 6 Sex in Relation to Society
a courtezan, and the term concubinage to the latter, because a concubine is a substituted partner of the bed, therefore for the sake of distinction, ante-nuptial stipulation with a woman is signified by keeping a mistress, and post-nuptial by concubinage.— The Delights of Wisdom Pertaining to Conjugial Love
Concubine has been looked up 372 times, favorited 5 times, listed 40 times, and commented on twice.

American Heritage Dictionary (1)
Century Dictionary (1)
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