The Collaborative International Dictionary of English v.0.48:

Chaste \Chaste\ (ch[=a]st), a. [F. chaste, from L. castus pure,
   chaste; cf. Gr. kaqaro`s pure, Skr. [,c]udh to purify.]
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   1. Pure from unlawful sexual intercourse; virtuous;
      continent. "As chaste as Diana." --Shak.
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            Whose bed is undefiled and chaste pronounced.
                                                  --Milton.
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   2. Pure in thought and act; innocent; free from lewdness and
      obscenity, or indecency in act or speech; modest; as, a
      chaste mind; chaste eyes.
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   3. Pure in design and expression; correct; free from
      barbarisms or vulgarisms; refined; simple; as, a chaste
      style in composition or art.
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            That great model of chaste, lofty, and eloquence,
            the Book of Common Prayer.            --Macaulay.
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   4. Unmarried. [Obs.] --Chaucer.

   Syn: Undefiled; pure; virtuous; continent; immaculate;
        spotless.
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   Chaste tree. Same as Agnus castus.
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