(~s)
1.
If you say that a statement is an ~, you mean that it does not fully express the extent to which something is true.
To say I’m disappointed is an ~...
He was getting very hard to live with, and that’s the ~ of the year.
N-COUNT
2.
Understatement is the practice of suggesting that things have much less of a particular quality than they really have.
He informed us with massive ~ that he was feeling disappointed.
...typical British ~.
N-UNCOUNT