Dreaming about wearing a collar may signify being enslaved or in an oppressive state of mind, feeling oppressed by society’s rigid beliefs and norms. It can be seen as a negative response to living within social expectations all life long.
Within the context of dream analysis, a collar can symbolize anger management or attack control, societal restrictions and taboos. The wearing of a collar in your dream indicates being obedient to someone or something—you are conforming and living within the rules put forth by others.