冷静 (Reisei) is a Japanese noun meaning “calmness, composure, coolness, serenity”.
Meanings
- noun, na-adjectivecalmness; composure; coolness; serenity; presence of mind
Examples
彼は冷静ですね。
He is cool, isn't he?
彼はいつも冷静だ。
He is always cool.
冷静に考えて見ろよ！
Get real!
Sentences from Tatoeba (CC BY 2.0 FR).