| Date: | 1100-1200 |
| Origin: | all 'everything, everyone' + together |
| |||||||||
al‧to‧geth‧er1 S2 W3

1 used to emphasize that something has been done completely or has finished completely :
an old custom that has vanished altogether
Congress could ban the procession altogether.
an old custom that has vanished altogether
Congress could ban the procession altogether.2 [+adjective/adverb] used to emphasize that the way you describe something is completely true :
In Canada, the situation is altogether different.
In Canada, the situation is altogether different. not altogether (=not completely)
I wasn't altogether happy about Mike staying over.
The results were not altogether surprising.
I wasn't altogether happy about Mike staying over.
The results were not altogether surprising.3 used to show that you are referring to the total amount :
There were five people altogether.
How much do I owe you altogether?
There were five people altogether.
How much do I owe you altogether?4 used to make a final statement about several things you have just mentioned [= all in all]:
Lots of sunshine, wonderful food, and amazing nightlife - altogether a great vacation!
Lots of sunshine, wonderful food, and amazing nightlife - altogether a great vacation!