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

humble \hum"ble\ hu^m"b'l; 277, a. compar. humbler
   hu^m"bl~er; superl. humblest hu^m"ble^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.
      1913 webster

            thy humble nest built on the ground.  --cowley.
      1913 webster

   2. not pretentious or magnificent; unpretending; unassuming;
      modest; as, a humble cottage. used to describe objects.
      1913 webster

   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.
      1913 webster

            god resisteth the proud, but giveth grace unto the
            humble.                               --jas. iv. 6.
      1913 webster

            she should be humble who would please. --prior.
      1913 webster

            without a humble imitation of the divine author of
            our . . . religion we can never hope to be a happy
            nation.                               --washington.
      1913 webster

   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.
      1913 webster
see also:
humbler humblest homage chameleon humiliate humble plant 
mimosa mimosa sensitiva to eat humble pie humbles 

[2] : WordNet (r) 2.0

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
see also:
sensitive plant touch-me-not shame plant live-and-die action plant mimosa pudica 

Plant >> P Words
Plant, definition of term: Plant
plant_pag1.html

Humble >> H Words
Humble, definition of term: Humble
humble_pag1.html

Plant Life >> P Words
Plant Life, definition of term: Plant Life
plant+life_pag1.html

Plant Hopper >> P Words
Plant Hopper, definition of term: Plant Hopper
plant+hopper_pag1.html

Indigo Plant >> I Words
Indigo Plant, definition of term: Indigo Plant
indigo+plant_pag1.html

Aquatic Plant >> A Words
Aquatic Plant, definition of term: Aquatic Plant
aquatic+plant_pag1.html

Century Plant >> C Words
Century Plant, definition of term: Century Plant
century+plant_pag1.html

Air Plant >> A Words
Air Plant, definition of term: Air Plant
air+plant_pag1.html

Jumping Plant L >> J Words
Jumping Plant L, definition of term: Jumping Plant L
jumping+plant+l_pag1.html