underdose verb 3noun 2forms 3 verb3 •To administer an inadequate dose (to someone or to oneself).It is true that insulin costs are high; as a result some patients may underdose. We need better reimbursement to address that. — 2016 •To administer an inadequate dose of (a medication).An intern underdosed her heparin (blood thinner), and she suffered a large blood clot in a lung. — 2013 •(figurative) To use a scant or inadequate amount of an ingredient or product.My advice is to slightly under-dose on the whiskey in Delia’s recipe, who I imagine went for a rather better bottle than I did. — 2016 noun2 •An inadequate dose (of a medication). •(figurative) An inadequate amount of something.“Seems as though sometimes I get an overdose of feeling, and an underdose of sense.” — 1955 formsunderdosed · underdosing · underdoses