1. The quality or state of being placid; calmness, peacefulness, and tranquility
The placidity of the lake reflected the clear blue sky.
A placidez do lago refletia o céu azul claro.
2. Absence of disturbance, agitation, or strong emotion
She maintained her placidity despite the chaotic situation around her.
Ela manteve sua placidez apesar da situação caótica ao seu redor.