cloister:A covered walk or arcade connected with a monastery, college, or large church, serving as a way of communication between different parts of the group of buildings, and sometimes as a place of exercise or study; often running round the open court of a quadrangle, with a plain wall on the one side, and a series of windows or an open colonnade on the other.——Oxford English Dictionary

cloister:a covered passage that surrounds one side of a square garden in a church, monastery etc.——Longman Dictionary of Contemporary English  @en