Nouns

(n)expostulation, remonstrance, remonstration, objectionthe act of expressing earnest opposition or protest
(n)objectionthe speech act of objecting
(n)protest, objection, dissentthe act of protesting; a public (often organized) manifestation of dissent
(n)objection(law) a procedure whereby a party to a suit says that a particular line of questioning or a particular witness or a piece of evidence or other matter is improper and should not be continued and asks the court to rule on its impropriety or illegality