Source : Webster's Revised Unabridged Dictionary (1913)

Humble \Hum"ble\, a. [Compar. {Humbler}; superl. {Humblest}.]
   [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; not pretentious or
      magnificent; unpretending; unassuming; as, a humble
      cottage.

            THy humble nest built on the ground.  --Cowley.

   2. 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; waek; modest.

            God resisteth the proud, but giveth grace unto the
            humble.                               --Jas. iv. 6.

            She should be humble who would please. --Prior.

            Without a humble imitation of the divine Author of
            our . . . religion we can never hope to be a happy
            nation.                               --Washington.

   {Humble plant} (Bot.), a species of sensitive plant, of the
      genus {Mimosa} ({M. sensitiva}).

   {To eat humble pie}, to endure mortification; to submit or
      apologize abjectly; to yield passively to insult or
      humilitation; -- 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.

Source : WordNet®

humble plant
     n : prostrate or semi-erect subshrub of tropical America, and
         Australia; heavily armed with recurved thorns and having
         sensitive soft gray-green leaflets that fold and droop at
         night or when touched or cooled [syn: {sensitive plant},
         {touch-me-not}, {shame plant}, {live-and-die}, {action
         plant}, {Mimosa pudica}]