used for showing that a total number or amount includes everyone or everything
Altogether, about 50 NATO aircraft took part in the attack.
How many guests will there be altogether?
(used to emphasize sth) completely; in every way （用以强调）完全，全部
The train went slower and slower until it stopped altogether.
火车愈来愈慢，最后完全停了。
I don’t altogether agree with you.
我不完全同意你的意见。
I am not altogether happy (= I am very unhappy) about the decision.
我对这个决定很不满意。
It was an altogether different situation.
这完全是另外一种情况。