n. Too great a dose; an excessive dose. [ 1913 Webster ]
v. t. To dose to excess; to give an overdose, or too many doses, to. [ 1913 Webster ]
n. A dose which is less than required; a small or insufficient dose. [ 1913 Webster ]
v. t. & i. To give an underdose or underdoses to; to practice giving insufficient doses. [ 1913 Webster ]