objection - noun

the act of expressing earnest opposition or protest

the speech act of objecting

the act of protesting; a public (often organized) manifestation of dissent

(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

objection - thesaurus

dissent   expostulation   protest   remonstrance   remonstration