* Noun: When referring to the act of disagreeing or protesting.
* Interjection: When used as a direct exclamation of disagreement, often in legal or formal settings.
* Verb: Though less common, it can also be used as a verb meaning "to disagree" or "to protest".
Here are some examples:
* Noun: "He raised an objection to the proposed plan."
* Interjection: "Objection! Hearsay!" (legal context)
* Verb: "She objected to the harsh language used in the presentation."