undercount noun 1verb 1forms 3 noun1 •An incorrect count that is too low.And that, Lady Darvish thought, was almost certainly an undercount. — 2023 verb1 •To count to an insufficient degree; to count one thing disproportionately less than anotherBut minority stations have claimed that they are undercounted in the new system, in part because Arbitron has struggled to include representative numbers of young and minority listeners in its sample. — 2009 formsundercounted · undercounting · undercounts