To dream that you or someone is in uniform signifies your need to belong or be part of a group. Alternatively, the dream may suggest that you are conforming too much to the beliefs of others. Learn to think for yourself and be your own person.
In particular, to see a nurse’s uniform in your dream indicates cleanliness, compassion, and properness. To see a school uniform means how you are identifying with your school and your classmates. It may bring attention to some issue you have at school. To see people in strange uniforms signify disruption and chaos.