If you had to wear a uniform at work, and you dream of being in uniform, it means you are still worried at a work related issue.
If you never had to wear a uniform while at work, but still dream of seeing or using a uniform, it can mean that you are being suppressed at work. You were ordered to wear a uniform because of power play. The lower ranked staff can be told to wear a uniform, while the management do not need to do so.
Dreaming of the uniform as a symbol, can mean you might need to organize your work and chores, to be efficient.