prep.
In memory of; as a memorial to. Used especially in epitaphs.
[From Latin in memoriam, to the memory (of) : in, in, into + memoriam, accusative of memoria, memory.]
The American Heritage® Dictionary of the English Language, Fourth Edition Copyright © 2007, 2000 by Houghton Mifflin Company. Updated in 2009. Published by Houghton Mifflin Company. All rights reserved.