since : Idioms & Phrases
long since
-
adverb of the distant or comparatively distant past
long ago; lang syne.
- We met once long ago
- they long ago forsook their nomadic life
- left for work long ago
- he has long since given up mountain climbing
- This name has long since been forgotten
- lang syne" is Scottish
WordNet
since a long time ago
-
adverb since long ago
from way back.
- she knows him from way back