The Collaborative International Dictionary of English v.0.48:

Humble \Hum"ble\ (h[u^]m"b'l; 277), a. [Compar. Humbler
   (h[u^]m"bl[~e]r); superl. Humblest (h[u^]m"bl[e^]st).] [F.,
   fr. L. humilis on the ground, low, fr. humus the earth,
   ground. See Homage, and cf. Chameleon, Humiliate.]
   1. Near the ground; not high or lofty.
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            Thy humble nest built on the ground.  --Cowley.
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   2. Not pretentious or magnificent; unpretending; unassuming;
      modest; as, a humble cottage. Used to describe objects.
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   3. Thinking lowly of one's self; claiming little for one's
      self; not proud, arrogant, or assuming; thinking one's
      self ill-deserving or unworthy, when judged by the demands
      of God; lowly; weak; modest. Used to describe people.
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            God resisteth the proud, but giveth grace unto the
            humble.                               --Jas. iv. 6.
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            She should be humble who would please. --Prior.
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            Without a humble imitation of the divine Author of
            our . . . religion we can never hope to be a happy
            nation.                               --Washington.
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   Humble plant (Bot.), a species of sensitive plant, of the
      genus Mimosa (Mimosa sensitiva).

   To eat humble pie, to endure mortification; to submit or
      apologize abjectly; to yield passively to insult or
      humiliation; -- a phrase derived from a pie made of the
      entrails or humbles of a deer, which was formerly served
      to servants and retainers at a hunting feast. See
      Humbles. --Halliwell. --Thackeray.
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The Collaborative International Dictionary of English v.0.48:

Humble \Hum"ble\, a.
   Hornless. See Hummel. [Scot.]
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The Collaborative International Dictionary of English v.0.48:

Humble \Hum"ble\, v. t. [imp. & p. p. Humbled; p. pr. & vb. n.
   Humbling.]
   1. To bring low; to reduce the power, independence, or
      exaltation of; to lower; to abase; to humilate.
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            Here, take this purse, thou whom the heaven's
            plagues
            Have humbled to all strokes.          --Shak.
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            The genius which humbled six marshals of France.
                                                  --Macaulay.
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   2. To make humble or lowly in mind; to abase the pride or
      arrogance of; to reduce the self-sufficiently of; to make
      meek and submissive; -- often used rexlexively.
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            Humble yourselves therefore under the mighty hand of
            God, that he may exalt you.           --1 Pet. v. 6.

   Syn: To abase; lower; depress; humiliate; mortify; disgrace;
        degrade.
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WordNet (r) 3.0 (2006):

humble
    adj 1: low or inferior in station or quality; "a humble
           cottage"; "a lowly parish priest"; "a modest man of the
           people"; "small beginnings" [syn: humble, low,
           lowly, modest, small]
    2: marked by meekness or modesty; not arrogant or prideful; "a
       humble apology"; "essentially humble...and self-effacing, he
       achieved the highest formal honors and distinctions"-
       B.K.Malinowski [ant: proud]
    3: used of unskilled work (especially domestic work) [syn:
       humble, menial, lowly]
    4: of low birth or station (`base' is archaic in this sense);
       "baseborn wretches with dirty faces"; "of humble (or lowly)
       birth" [syn: base, baseborn, humble, lowly]
    v 1: cause to be unpretentious; "This experience will humble
         him"
    2: cause to feel shame; hurt the pride of; "He humiliated his
       colleague by criticising him in front of the boss" [syn:
       humiliate, mortify, chagrin, humble, abase]