To wear a uniform in Engpsh means to dress in a specific type of clothing that is worn by a group of people, usually as a way to identify themselves as members of that group or organization. For example, you might say "I'm going to wear my uniform to work today," if you work at a job that requires you to wear a specific type of clothing. Alternatively, you could say "The team is required to wear their uniforms to all of the games," to describe a group of people who are expected to dress in a certain way when they are participating in a sporting event.