An objector is someone who disagrees with or opposes a particular idea, action, or belief. They express their opposition by raising objections or raising their voice against it. Full definition
As someone who has been a conscientious objector of high stakes standardized tests and is actively involved in the opt out campaign in our state, the decoupling of standardized tests scores from the teacher evaluation does not get at the root of the issues. (morecaucusnyc.org)
There are also cases of objectors serving in service positions of a military branch, such as medics or chaplains. (law.stackexchange.com)
He's on the board of Quaker House of Fayetteville, a group that works with conscientious objectors in the military, and works with Urban Ministries of Durhamand The Metta Center. (rachelheldevans.com)