Placidity/pləˈsɪdəti/ Definition 1 of 2Pro Tip 1/3Emotional Calm Placidity refers to inner peace, not just lack of physical commotion. The monk's placidity was evident despite the noisy streets. Pro Tip 2/3Not Apathy Placidity is a peaceful state, not a lack of caring or emotion. The teacher's placidity helped soothe the upset child. Pro Tip 3/3Positive Connotation Placidity usually suggests someone is admirable for staying calm. She admired his placidity during the heated debate.