Meaning of とっくに in Japanese

Definition of とっくに

とっくに(tokkuni) 【疾っくに】

(adv) long ago; already; a long time ago
もうとっくに寝る時間だ。
It is high time we went to bed.

It's high time you got going.

It's about time you got here!

I ran to school, but the bell had already rung.

もうとっくに寝る時間ねるじかんだ。

It is high time we went to bed.

It's high time you left for school, isn't it?

Already he was aware of it.

おまえ達たち子供こどもが寝る時間ねるじかんはもうとっくに来てくるいるよ。

It's high time you children went to bed.