re‧o‧pen [intransitive and transitive]
if a theatre, restaurant etc reopens, or if it is reopened, it opens again after a period when it was closed:
The swimming pool will reopen in May.
if you reopen a discussion, law case etc, or if it reopens, you begin it again after it had stopped
reopen a case/question/debate etc
attempts to reopen the issue of the power station's future
if a government reopens the border of their country, or if the border reopens, people are allowed to pass through it again after it had been closed