1. The quality of being calm, rational, and able to make good decisions even in difficult or stressful situations
Her level-headedness during the crisis helped everyone stay calm.
A sensatez dela durante a crise ajudou todos a manter a calma.
2. Composed and practical thinking without emotional disturbance
The engineer's level-headedness prevented a serious accident.
A sensatez do engenheiro preveniu um acidente grave.