[loo-ney-shuh n]


the period of time from one new moon to the next (about 29½ days); a lunar month.

Origin of lunation

1350–1400; Middle English lunacyon < Medieval Latin lūnātiōn- (stem of lūnātiō). See Luna, -ation Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019

Examples from the Web for lunation

Historical Examples of lunation

British Dictionary definitions for lunation



another name for synodic month See month (def. 6)
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012

Word Origin and History for lunation

"time from one new moon to another," late 14c., from Medieval Latin lunationem, from luna "moon" (see Luna).

Online Etymology Dictionary, © 2010 Douglas Harper