[ 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 forms

im·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 Forms

immemorially, 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

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.