n. the last of the canonical hours, sung just before retiring
the GNU version of the Collaborative International Dictionary of English
n. The last division of the Roman Catholic breviary; the seventh and last of the canonical hours of the Western church; the last prayer of the day, to be said after sunset.
WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.
n. last of the seven canonical hours just before retiring
Word Usage
"To keep a medieval focus: I often sing with a compline group at Columbia, on Sunday nights."