This means that you face constraints (restrictions) in your waking life. For a worker in uniform, who is hired by a company, has to obey the terms and conditions imposed by their employer. If you dream of yourself wearing a uniform, or you see a worker wearing a uniform, it means you face constraints in waking life. Your hands are tied and you feel frustration of being restrained. If you get this dream as a recurring one, then you may like to think about making some edits or changes. Weigh your options and consequences. A person may think that the grass is greener on the other side of the fence, but remember, when you choose your change, you will face a different set of terms and conditions. Make sure you are aware of what is on the other side of the fence.