Meaning of 冷淡 in Japanese

Definition of 冷淡

れいたん(reitan) 【冷淡 ·冷澹】

(adj-na, n) coolness; indifference
私の演説は冷淡な沈黙で迎えられた。
My speech was greeted with cold silence.

れいたんむじょう(reitanmujou) 【冷淡無情】

彼女かのじょは私わたしに冷淡れいたんだ。

She is cold to me.

彼かれは確かにたしかに利口りこうではあるが、冷淡れいたんでもある。

He is clever, no doubt, but he is cold, too.

It is said that Japanese people are kind to people they know, but rather cold to those they don't.