- A diminution or softening of statement for the sake of
avoiding censure or increasing the effect by contrast with the
moderation shown in the form of expression; as, " a citizen of no mean
city," that is, of an illustrious city.
Meaning of 'litotes' (Princeton's WordNet)
1 . litotes
[ n]
Meaning (1): - understatement for rhetorical effect (especially when expressing an affirmative by negating its contrary)
Example in sentence:
saying `I was not a little upset' when you mean `I was very upset' is an example of litotes