1
general::
Phrase(s): in memory of someone
to continue the good memories of someone; for the honor of a deceased person. • Many streets were renamed in memory of John F. Kennedy. • We planted roses in memory of my deceased father.
McGrawhill's American Idioms And Phrasal Verbs
2
general::
As a reminder of or memorial to. For example, In memory of Grandma we put flowers on her grave every Easter, or In memory of our happy times here we've planted a little garden. [First half of 1300s]
American Heritage Idioms