logjam [lawg-jam, log-] WORD ORIGIN noun an immovable pileup or tangle of, as in a river, causing a blockage. any blockage or massive accumulation: a logjam of bills before Congress.
Origin of logjam First recorded in 1880–85;+ Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019 British Dictionary definitions for log jam log jam noun mainly US and Canadian blockage caused by the crowding together of a number of logs floating in a river a deadlock; standstill 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 log jam logjam n.
also log-jam, “congestion of logs on a river,” by 1851, American English; see(n.1) + (v.). The figurative sense is by 1890.
Online Etymology Dictionary, © 2010 Douglas Harper