overvote

(noun, verb)

noun

1. (US, politics) A case in which a voter has marked a ballot for more choices than allowed by the rules

2. (business) A case in which more votes are cast in a voter's name than allowed under the rules

verb

1. (US, politics) To spoil a ballot by marking it for more choices than allowed by the rules

2. (business) To cast more votes than allowed under the rules

3. (obsolete) To outvote or overrule