Definitions for old guard
Random House Webster's College Dictionary
the imperial guard created in 1804 by Napoleon.
Category: Western History
(sometimes l.c.) the conservative members of a political party or other group.
Origin of Old Guard:
trans. of F Vieille Garde
a faction that is unwilling to accept new ideas
A conservative, reactionary faction that is unwilling to accept new ideas
Collectively, the members of a team who have been a long time in a place.
Origin: old + guard