The Collaborative International Dictionary of English v.0.48:

Harlot \Har"lot\, v. i.
   To play the harlot; to practice lewdness. --Milton.
   [1913 Webster]

The Collaborative International Dictionary of English v.0.48:

Harlot \Har"lot\ (-l[o^]t), n. [OE. harlot, herlot, a vagabond,
   OF. harlot, herlot, arlot; cf. Pr. arlot, Sp. arlote, It.
   arlotto; of uncertain origin.]
   1. A churl; a common man; a person, male or female, of low
      birth. --[Obs.]
      [1913 Webster]

            He was a gentle harlot and a kind.    --Chaucer.
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   2. A person given to low conduct; a rogue; a cheat; a rascal.
      [Obs.] --Chaucer.
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   3. A woman who prostitutes her body for hire; a prostitute; a
      common woman; a strumpet.
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The Collaborative International Dictionary of English v.0.48:

Harlot \Har"lot\, a.
   Wanton; lewd; low; base. --Shak.
   [1913 Webster]

WordNet (r) 3.0 (2006):

harlot
    n 1: a woman who engages in sexual intercourse for money [syn:
         prostitute, cocotte, whore, harlot, bawd, tart,
         cyprian, fancy woman, working girl, sporting lady,
         lady of pleasure, woman of the street]