dissent in WordNet English dictionary

1. be of different opinions
   "I beg to differ!"; "She disagrees with her husband on many questions"
   disagree  differ  dissent  take issue 
   
2. withhold assent
   "Several Republicans dissented"
   dissent 
   
3. express opposition through action or words
   "dissent to the laws of the country"
   protest  resist  dissent 
   

1. the act of protesting; a public (often organized) manifestation of dissent
   protest  objection  dissent 
   
2. (law) the difference of one judge's opinion from that of the majority
   "he expressed his dissent in a contrary opinion"
   dissent 
   
3. a difference of opinion
   dissent