objection in WordNet English dictionary

1. the act of protesting; a public (often organized) manifestation of dissent
   protest  objection  dissent 
   
2. the act of expressing earnest opposition or protest
   expostulation  remonstrance  remonstration  objection 
   
3. (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 
   
4. the speech act of objecting
   objection