objection Definition

1. The act of objecting.
2. An expression or feeling of disapproval, opposition or dislike, etc.

Thesaurus: exception, opposition, protest, challenge, protestation, criticism, reproach, complaint, remonstrance; Antonym: agreement, assent.
3. A reason or cause for disapproving, opposing or disliking it, etc.

Form: objection against something (often)
Form: objection to something