hortus conclusus [ˈhɔːtəs kənˈkluːsəs] n.
1.) An enclosed, inviolate garden; in spiritual and exegetical tradition, the symbol of the soul, the Church, or the virginity of Mary. In Art, a painting of the Madonna and Child in an enclosed garden. Frequently in transferred sense (Oxford English Dictionary Second Edition).
Etymology: Latin, = enclosed garden, in reference to Song of Solomon 4.12.
"The heart of man is hortus, it is a garden, a Paradise, where all that is wholesome, and all that is delightful grows, but it is hortus conclusus, a garden that we ourselves have walled in; it is fons, a fountain, where all knowledge springs, but fons signatus, a fountain that our corruption hath sealed up" (John Donne, "Sermons No. 13: Preached to the Earl of Carlisle, and his Company, at Sion, on Mark 16.16", ~1622).
Thanks to Bibi for bringing this one to my attention; I hadn't heard it before. I couldn't find a pronunciation, though. Can you record an mp3 and I'll post it for everyone? Thanks for reading!