[ im-uh-mawr-ee-uhl, -mohr- ]
/ ˌɪm əˈmɔr i əl, -ˈmoʊr- /


extending back beyond memory, record, or knowledge: from time immemorial.

Origin of immemorial

From the Medieval Latin word immemoriālis, dating back to 1595–1605. See im-2, memorial
Related formsim·me·mo·ri·al·ly, adverb Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019

Examples from the Web for immemorial

British Dictionary definitions for immemorial


/ (ˌɪmɪˈmɔːrɪəl) /


originating in the distant past; ancient (postpositive in the phrase time immemorial)
Derived Formsimmemorially, adverb

Word Origin for immemorial

C17: from Medieval Latin immemoriālis, from Latin im- (not) + memoria memory
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 immemorial



c.1600, from French immémorial (16c.) "old beyond memory," from Medieval Latin immemorialis, from assimilated form of in- "not, opposite of" (see in- (1)) + memorialis (see memorial). Something immemorial is ancient beyond memory; something immemorable is not memorable.

Online Etymology Dictionary, © 2010 Douglas Harper

Idioms and Phrases with immemorial


see time immemorial.

The American Heritage® Idioms Dictionary Copyright © 2002, 2001, 1995 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company.