Definition of "Dissent" :

noun: the act of protesting; a public (often organized) manifestation of dissent

noun: a difference of opinion

noun: (law) the difference of one judge's opinion from that of the majority

"He expressed his dissent in a contrary opinion."

verb: withhold assent

"Several Republicans dissented."

verb: be of different opinions

verb: express opposition through action or words

"Dissent to the laws of the country."