lightning; a flash of lightning — the bright, short-lived streak of light seen during a thunderstorm.
夜空に稲妻が走り、遠くで雷が鳴った。
A bolt of lightning streaked across the night sky, and thunder rumbled in the distance.
暗い雲の中で稲妻が光るのを見て、急いで家に戻った。
Seeing lightning flashing among the dark clouds, I hurried back home.
稲妻に打たれる危険があるので、雷雨のときは高い場所を避けるべきだ。
There is a danger of being struck by lightning, so you should avoid high places during a thunderstorm.