What is Protestor?

Protestor definition and meaning on Dictionary terms:
an expression or declaration of objection, disapproval, or dissent, often in opposition to something a person is powerless to prevent or avoid: a protest against increased taxation.
Commerce. a formal notarial certificate attesting the fact that a check, note, or bill of exchange has been presented for acceptance or payment and that it has been refused. the action taken to fix the liability for a dishonored bill of exchange or note.

Law. (upon one’s payment of a tax or other state or city exaction) a formal statement disputing the legality of the demand. a written and attested declaration made by the master of a ship stating the circumstances under which some damage has happened to the ship or cargo, or other circumstances involving the liability of the officers, crew, etc.

Sports. a formal objection or complaint made to an official.

verb (used without object)
to give manifest expression to objection or disapproval; remonstrate.
to make solemn or earnest declaration.

verb (used with object)
to make a protest or remonstrance against; object to.
to say in protest or remonstrance.

to declare solemnly or earnestly; affirm; assert.
to make a formal declaration of the nonacceptance or nonpayment of (a bill of exchange or note).
Obsolete. to call to witness.