understatement

1. A figure of speech whereby something is made to seem smaller or less important than it actually is, either through phrasing or lack of emphasis, often for ironic effect. (uncountable) · A master of understatement
2. An instance of such phrasing or lack of emphasis; an incomplete statement. (countable) · Now that's an understatement.
3. An incomplete disclosure that intentionally withholds relevant information. (uncountable)

Plural understatements