The Collaborative International Dictionary of English v.0.48:

Prostitute \Pros"ti*tute\, v. t. [imp. & p. p. Prostituted; p.
   pr. & vb. n. Prostituting.] [L. prostitutus, p. p. of
   prostituere to prostitute; pro before, forth + statuere to
   put, place. See Statute.]
   1. To offer, as a woman, to a lewd use; to give up to
      lewdness for hire. "Do not prostitute thy daughter."
      --Lev. xix. 29.
      [1913 Webster]

   2. To devote to base or unworthy purposes; to give up to low
      or indiscriminate use; as, to prostitute talents; to
      prostitute official powers. --Milton.
      [1913 Webster]

The Collaborative International Dictionary of English v.0.48:

Prostitute \Pros"ti*tute\, a. [L. prostitutus, p. p.]
   Openly given up to lewdness; devoted to base or infamous
   purposes.
   [1913 Webster]

         Made bold by want, and prostitute for bread. --Prior
   [1913 Webster]

The Collaborative International Dictionary of English v.0.48:

Prostitute \Pros"ti*tute\, n. [L. prostituta.]
   1. A woman giver to indiscriminate lewdness; a strumpet; a
      harlot.
      [1913 Webster]

   2. A base hireling; a mercenary; one who offers himself to
      infamous employments for hire.
      [1913 Webster]

            No hireling she, no prostitute to praise. --Pope.
      [1913 Webster]

WordNet (r) 3.0 (2006):

prostitute
    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]
    v 1: sell one's body; exchange sex for money