"Open dissent" refers to the act of expressing disagreement, criticism, or opposition in a public or visible manner, instead of keeping it private. It means openly speaking out or taking a stand against something you oppose.
Sentences with «open dissent»
Dealing with different opinions or even open dissent is challenging for any small business owner. (inc.com)
Moreover, open dissent now brings personal risks. (firstthings.com)
Mr Miliband is being threatened with further open dissent if his party does not gain seats in Thursday's poll. (dailymail.co.uk)