Definition of doses:
(n) :
A measured portion of medicine taken at any one time.
(n) :
The quantity of an agent (not always active), substance, or radiation administered or experienced at any one time.
(v) :
(transitive) To administer a dose (of medicine) to.
(v) :
To prescribe a dose.
(v) :
(transitive) To surreptitiously administer a dose of an incapacitating drug (to an unwilling subject); to roofie.
(n) :
(figurative, dated) Anything disagreeable that must be taken.