Result from Foreign Dictionaries (2 entries found)
From The Collaborative International Dictionary of English v.0.48 [gcide]:
White slave \White slave\
A woman held in involuntary confinement for purposes of
prostitution; loosely, any woman forced into unwilling
prostitution.
[Webster 1913 Suppl.]
From WordNet (r) 3.0 (2006) [wn]:
white slave
n 1: a woman sold into prostitution