The Collaborative International Dictionary of English v.0.48:

Dose \Dose\, v. t. [imp. & p. p. Dosed; p. pr. & vb. n.
   dosing.] [Cf. F. doser. See Dose, n.]
   1. To proportion properly (a medicine), with reference to the
      patient or the disease; to form into suitable doses.
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   2. To give doses to; to medicine or physic to; to give
      potions to, constantly and without need.
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            A self-opinioned physician, worse than his
            distemper, who shall dose, and bleed, and kill him,
            "secundum artem."                     -- South
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   3. To give anything nauseous to.
      [1913 Webster]

The Collaborative International Dictionary of English v.0.48:

Dose \Dose\ (d[=o]s), n. [F. dose, Gr. do`sis a giving, a dose,
   fr. dido`nai to give; akin to L. dare to give. See Date
   point of time.]
   1. The quantity of medicine given, or prescribed to be taken,
      at one time.
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   2. A sufficient quantity; a portion; as much as one can take,
      or as falls to one to receive.
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   3. Anything unpleasant that one is obliged to take; a
      disagreeable portion thrust upon one; also used
      figuratively, as to give someone a dose of his own
      medicine, i. e. to retaliate in kind.
      [1913 Webster]

            I am for curing the world by gentle alteratives, not
            by violent doses.                     -- W. Irving.
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            I dare undertake that as fulsome a dose as you give
            him, he shall readily take it down.   -- South.
      [1913 Webster]

   4. a quantity of radiation which an object absorbs, or to
      which it is exposed.
      [PJC]

WordNet (r) 3.0 (2006):

dose
    n 1: a measured portion of medicine taken at any one time [syn:
         dose, dosage]
    2: the quantity of an active agent (substance or radiation)
       taken in or absorbed at any one time [syn: dose, dosage]
    3: a communicable infection transmitted by sexual intercourse or
       genital contact [syn: venereal disease, VD, venereal
       infection, social disease, Cupid's itch, Cupid's
       disease, Venus's curse, dose, sexually transmitted
       disease, STD]
    4: street name for lysergic acid diethylamide [syn: acid,
       back breaker, battery-acid, dose, dot, Elvis,
       loony toons, Lucy in the sky with diamonds, pane,
       superman, window pane, Zen]
    v 1: treat with an agent; add (an agent) to; "The ray dosed the
         paint"
    2: administer a drug to; "They drugged the kidnapped tourist"
       [syn: drug, dose]