見みる間まに

expression

in the blink of an eye; before one's eyes; quickly

Describes a change or action that happens so fast it seems to occur while you are still watching. Often used with verbs of change, disappearance, or growth.

• 空そらがみるまに暗くらくなった。

  The sky grew dark in the blink of an eye.

• 彼かれは見みる間まに成せい長ちょうした。

  He grew up before our very eyes.