The Collaborative International Dictionary of English v.0.48:

Harlotry \Har"lot*ry\ (-r[y^]), n.
   1. Ribaldry; buffoonery; a ribald story. [Obs.] --Piers
      Plowman. --Chaucer.
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   2. The trade or practice of prostitution; habitual or
      customary lewdness. --Dryden.
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   3. Anything meretricious; as, harlotry in art.
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   4. A harlot; a strumpet; a baggage. [Obs.]
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            He sups to-night with a harlotry.     --Shak.
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WordNet (r) 3.0 (2006):

harlotry
    n 1: offering sexual intercourse for pay [syn: prostitution,
         harlotry, whoredom]