a composition usually for organ that is based on a chorale or other hymn tune and is typically contrapuntal in style.
Origin of chorale prelude
First recorded in 1920–25
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019
a composition for organ using a chorale as a cantus firmus or as the basis for variations
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