a bookbinding having soft edges that project beyond and fold over the edges of the pages to protect them.
Origin of circuit binding
An Americanism dating back to 1905–10
Also called divinity circuit, yapp, yapp binding.
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019
a style of limp-leather binding, used esp for Bibles and prayer books, in which the edges of the cover bend over to protect the edges of the pages
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