A secondary or inferior wife.

And David took him more CONCUBINES and wives out of Jerusalem, after he was come from Hebron: and there were yet sons and daughters born to David. ( 2 Samuel 1:1 Acts 5:13 )

Source: A King James Dictionary. (Used with permission. Copyright © Philip P. Kapusta)

Bibliography Information

"Entry for 'Concubine'". A King James Dictionary.