The Collaborative International Dictionary of English v.0.48:

Clean \Clean\ (kl[=e]n), a. [Compar. Cleaner (kl[=e]n"[~e]r);
   superl. Cleanest.] [OE. clene, AS. cl[=ae]ne; akin to OHG.
   chleini pure, neat, graceful, small, G. klein small, and
   perh. to W. glan clean, pure, bright; all perh. from a
   primitive, meaning bright, shining. Cf. Glair.]
   1. Free from dirt or filth; as, clean clothes.
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   2. Free from that which is useless or injurious; without
      defects; as, clean land; clean timber.
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   3. Free from awkwardness; not bungling; adroit; dexterous;
      as, a clean trick; a clean leap over a fence.
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   4. Free from errors and vulgarisms; as, a clean style.
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   5. Free from restraint or neglect; complete; entire.
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            When ye reap the harvest of your land, thou shalt
            not make clean riddance of corners of thy field.
                                                  --Lev. xxiii.
                                                  22.
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   6. Free from moral defilement; sinless; pure.
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            Create in me a clean heart, O God.    --Ps. li. 10
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            That I am whole, and clean, and meet for Heaven
                                                  --Tennyson.
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   7. (Script.) Free from ceremonial defilement.
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   8. Free from that which is corrupting to the morals; pure in
      tone; healthy. "Lothair is clean." --F. Harrison.
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   9. Well-proportioned; shapely; as, clean limbs.
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   A clean bill of health, a certificate from the proper
      authority that a ship is free from infection.

   Clean breach. See under Breach, n., 4.

   To make a clean breast. See under Breast.
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