An overvote occurs when a voter votes for more than the maximum number of selections allowed in a contest.  The result is that the voter’s vote in the overvoted race or referendum is not included in t [..]

A ballot on which more than one selection has been marked for a particular race which allows for only one choice to be selected

(US,politics) A case in which a voter has marked a ballot for more choices than allowed by the rules *a poll worker can manually override the program and accept the ballot, even though it has been [..]