overvote

Noun

 * 1)  A case in which a voter has marked a ballot for more choices than allowed by the rules
 * 2)  A case in which more votes are cast in a voter's name than allowed under the rules
 * 1)  A case in which more votes are cast in a voter's name than allowed under the rules

Verb

 * 1)  To spoil a ballot by marking it for more choices than allowed by the rules
 * 2)  To cast more votes than allowed under the rules
 * 3)  To outvote or overrule
 * 1)  To outvote or overrule
 * 1)  To outvote or overrule