ˈōl(d)ztə(r), -(d)st- noun
( -s )
1. : an experienced hand
oldsters pass it down faithfully to each newcomer — Elmont Waite
specifically : a midshipman of four years' standing in the British navy — distinguished from youngster
2. : an aging or elderly person
gray-bearded oldsters go swaggering down the boulevards — Hubert Herring
the accumulated wisdom and lore of the oldsters — E.A.Hoebel