The Collaborative International Dictionary of English v.0.48:

Pill \Pill\, n. [F. pilute, L. pilula a pill, little ball, dim.
   of L. pila a ball. Cf. Piles.]
   1. A medicine in the form of a little ball, or small round
      mass, to be swallowed whole.
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   2. Figuratively, something offensive or nauseous which must
      be accepted or endured. --Udall.
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   Pill beetle (Zool.), any small beetle of the genus
      Byrrhus, having a rounded body, with the head concealed
      beneath the thorax.

   Pill bug (Zool.), any terrestrial isopod of the genus
      Armadillo, having the habit of rolling itself into a
      ball when disturbed. Called also pill wood louse.
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The Collaborative International Dictionary of English v.0.48:

Pill \Pill\, n. [Cf. Peel skin, or Pillion.]
   The peel or skin. [Obs.] "Some be covered over with crusts,
   or hard pills, as the locusts." --Holland.
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The Collaborative International Dictionary of English v.0.48:

Pill \Pill\, v. i.
   To be peeled; to peel off in flakes.
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The Collaborative International Dictionary of English v.0.48:

Pill \Pill\, v. t. [Cf. L. pilare to deprive of hair, and E.
   pill, n. (above).]
   1. To deprive of hair; to make bald. [Obs.]
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   2. To peel; to make by removing the skin.
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            [Jacob] pilled white streaks . . . in the rods.
                                                  --Gen. xxx.
                                                  37.
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The Collaborative International Dictionary of English v.0.48:

Pill \Pill\, v. t. & i. [imp. & p. p. Pilled; p. pr. & vb. n.
   Pilling.] [F. piller, L. pilare; cf. It. pigliare to take.
   Cf. Peel to plunder.]
   To rob; to plunder; to pillage; to peel. See Peel, to
   plunder. [Obs.] --Spenser.
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         Pillers and robbers were come in to the field to pill
         and to rob.                              --Sir T.
                                                  Malroy.
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WordNet (r) 3.0 (2006):

pill
    n 1: something that resembles a tablet of medicine in shape or
         size
    2: a dose of medicine in the form of a small pellet [syn:
       pill, lozenge, tablet, tab]
    3: a unpleasant or tiresome person
    4: something unpleasant or offensive that must be tolerated or
       endured; "his competitor's success was a bitter pill to take"
    5: a contraceptive in the form of a pill containing estrogen and
       progestin to inhibit ovulation and so prevent conception
       [syn: pill, birth control pill, contraceptive pill,
       oral contraceptive pill, oral contraceptive, anovulatory
       drug, anovulant]