Definitions of dose:

• noun:   a measured portion of medicine taken at any one time
• noun:   the quantity of an active agent (substance or radiation) taken in or absorbed at any one time
• noun:   street name for lysergic acid diethylamide
• verb:   treat with an agent; add (an agent) to

  Example: "The ray dosed the paint"

• verb:   administer a drug to
• name:  A surname (very rare: popularity rank in the U.S.: #52085)