What is cloistral?

Famous quotes containing the word cloistral:

    “Fenced early in this cloistral round
    Of reverie, of shade, of prayer,
    How should we grow in other ground?
    How can we flower in foreign air?
    MPass, banners, pass, and bugles, cease;
    And leave our desert to its peace!”
    Matthew Arnold (1822–1888)