[1] : The Collaborative International Dictionary of English v.0.48

chaste \chaste\ ch=ast, a. f. chaste, from l. castus pure,
   chaste; cf. gr. kaqaro`s pure, skr. ,cudh to purify.
   1913 webster
   1. pure from unlawful sexual intercourse; virtuous;
      continent. "as chaste as diana." --shak.
      1913 webster

            whose bed is undefiled and chaste pronounced.
                                                  --milton.
      1913 webster

   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.
      1913 webster

   3. pure in design and expression; correct; free from
      barbarisms or vulgarisms; refined; simple; as, a chaste
      style in composition or art.
      1913 webster

            that great model of chaste, lofty, and eloquence,
            the book of common prayer.            --macaulay.
      1913 webster

   4. unmarried. obs. --chaucer.

   syn: undefiled; pure; virtuous; continent; immaculate;
        spotless.
        1913 webster

   chaste tree. same as agnus castus.
      1913 webster
see also:
chaste tree agnus castus 

[2] : WordNet (r) 2.0

chaste
     adj 1: morally pure especially not having experienced sexual
            intercourse; "a holy woman innocent and chaste" ant:
             unchaste
     2: pure and simple in design or style; "a chaste border of
        conventionalized flowers"
     3: abstaining from unlawful sexual intercourse
see also:
unchaste 

[3] : Moby Thesaurus II by Grady Ward, 1.0

173 moby thesaurus words for "chaste":
   apostolic, attic, ciceronian, encratic, lenten, pythagorean,
   rechabite, shaker, spartan, stoic, abase, absolute, abstemious,
   abstinent, aesthetic, afflict, artistic, ascetic, austere, bare,
   basic, becoming, beyond all praise, blotless, castigate, celibate,
   chasten, chastise, choice, classic, classical, clean, cleanly,
   clear, common, commonplace, continent, correct, decent, decorous,
   defectless, direct, discipline, easy, elegant, elementary,
   essential, ethical, everyday, excellent, faultless, finished,
   flawless, fruitarian, fundamental, garden, garden-variety, good,
   graceful, gracile, guiltless, homely, homespun, homogeneous,
   household, humble, humiliate, ideal, immaculate, impeccable,
   in good taste, indefectible, indefective, indivisible, infallible,
   innocent, irreducible, irreproachable, just right, limpid, lucid,
   maidenly, matter-of-fact, mere, modest, monolithic, moral, natural,
   neat, nephalistic, nondescript, of a piece, of choice, of quality,
   on the wagon, ordinary, peerless, pellucid, perfect, perspicuous,
   plain, pleasing, polished, primal, primary, proper, prosaic, prosy,
   pure, pure and simple, pure in heart, purehearted, quiet, refined,
   restrained, righteous, round, seemly, severe, sexually abstinent,
   sexually innocent, simon-pure, simple, single, sinless, snowy,
   spare, spotless, stainless, stark, straightforward, subdued,
   sworn off, taintless, tasteful, teetotal, terse, trim, try,
   unadorned, unadulterated, unaffected, unblemished, unblotted,
   uncluttered, uncontaminated, uncorrupt, undecorated, undefiled,
   understated, undifferenced, undifferentiated, unembellished,
   unfaultable, uniform, unlabored, unmixed, unobtrusive, unsoiled,
   unspotted, unstained, unsullied, untainted, untarnished,
   vegetarian, virgin, virginal, virtuous, well-chosen, white,
   wholesome, workaday, workday

Chaste >> C Words
Chaste, definition of term: Chaste
chaste_pag1.html

Chaste Tree >> C Words
Chaste Tree, definition of term: Chaste Tree
chaste+tree_pag1.html