Does brown university accept visiting undergraduate students?

Brown University does not have a formal visiting undergraduate student program in the same way some other universities do. They don't accept applications for a semester or year of study from undergraduates at other institutions as a general policy.

However, there might be *very limited* exceptions, such as through specific exchange programs or other pre-arranged partnerships with other universities. These would be highly individualized and not generally advertised as open applications. Therefore, it's safe to say the answer is effectively no for most prospective visiting undergraduates.