1. 
   Nocturn
   Noc'turn noun [ French nocturne , from Latin nocturnus . See Nocturnal , and confer Nocturne .] 1. An office of devotion, or act of religious service, by night. 2. One of the portions into which the Psalter ...
   Found op http://www.encyclo.co.uk/webster/N/26
   
   
2. 
   Nocturn
   • (n.) An office of devotion, or act of religious service, by night. • (n.) One of the portions into which the Psalter was divided, each consisting of nine psalms, designed to be used at a night service. • (n.) An office of devotion, or act of religious service, by night. • (n.) ...
   Found op http://thinkexist.com/dictionary/meaning/nocturn/
   
   
3. 
   nocturn
   nocturn In the Roman Catholic Church, one of the three divisions of the service of matins, previously held at midnight but now usually at daybreak.
   Found op http://www.wordinfo.info/words/index/info/view_unit/1402/2
   
   

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