Real Dictionary

protest
A protest that something is true is a strong declaration that it is true.
variable noun: A protest is the act of saying or showing publicly that you object to something.
verb: If you protest against something or about something, you say or show publicly that you object to it. In American English, you usually say that you protest it.
verb: If you protest that something is the case, you insist that it is the case, when other people think that it may not be.

protest in American English
an objection; remonstrance
to make solemn affirmation
to state positively; affirm solemnly; assert
intransitive verb: to give manifest expression to objection or disapproval; remonstrate
noun: an expression or declaration of objection, disapproval, or dissent, often in opposition to something a person is powerless to prevent or avoid
transitive verb: to make a protest or remonstrance against; object to

protest in British English
noun: public, often organized, dissent or manifestation of such dissent
verb: to make a strong objection (to something, esp a supposed injustice or offence)