Meaning of “protest” - Learner’s Dictionary

protest

verb uk us /prəʊˈtest/
protest (about/against/at sth)

B2 to show that you disagree with something by standing somewhere, shouting, carrying signs, etc:

They're on strike to protest against job losses.
Students were protesting about cuts to the education budget.
protest sth US

B2 to show that you disagree with something by standing somewhere, shouting, carrying signs, etc:

Thousands gathered to protest the plan.

B2 [ I, T ] to say something forcefully or complain about something:

[ + that ] The girl was crying, protesting that she didn't want to leave her mother.

(Definition of “protest verb” from the Cambridge Learner’s Dictionary © Cambridge University Press)