Bible Dictionaries
Nocturn

Webster's Dictionary

(1):

(n.) An office of devotion, or act of religious service, by night.

(2):

(n.) One of the portions into which the Psalter was divided, each consisting of nine psalms, designed to be used at a night service.

Bibliography Information
Webster, Noah. Entry for 'Nocturn'. Noah Webster's American Dictionary. https://www.studylight.org/​dictionaries/​eng/​web/​n/nocturn.html. 1828.