A uniform is what identifies everyone as part of one community, at school there's a uniform in order to make everyone equal, at work there's uniform to represent the company and stand out to customer's or clients.
Dictionary definition: (adjective)
1. Always the same, as in character or degree; unvarying
2. Conforming to one principle, standard, or rule; consistent
3. Being the same as or consonant with another or others
4. Unvaried in texture, colour or designPaul Shambroom, meetings.
Joe McNally - The hero's of Ground Zero (book)