This is the verse translation, not a definition of the individual word.
But if any of you cannot afford to marry free believing women, you may marry believing bondwomen in your possession. Allah knows best about your faith; you are from one another. Marry them with the permission of their masters and give them their dowries in fairness – provided that they are chaste, neither given to committing fornication nor having secret paramours. If they commit adultery after marriage, they are liable to half of the punishment prescribed for free women[1]. This is for those of you who fear falling into sin; but if you stay patient, it is better for you. And Allah is All-Forgiving, Most Merciful.
Source
[1] Their punishment is fifty (50) lashes; neither stoning to death nor exile.