lightning
US /ˈlaɪt.nɪŋ/
UK /ˈlaɪt.nɪŋ/

1.
foudre, éclair
the occurrence of a natural electrical discharge of very short duration and high voltage between a cloud and the ground or within a cloud, accompanied by a bright flash and typically also thunder
:
•
The sky was lit up by a sudden flash of lightning.
Le ciel fut illuminé par un éclair soudain de foudre.
•
We saw lightning strike a tree in the distance.
Nous avons vu la foudre frapper un arbre au loin.
1.
éclair, fulgurant
very fast; with great speed
:
•
He moved with lightning speed to catch the ball.
Il bougea à la vitesse de l'éclair pour attraper le ballon.
•
The decision was made with lightning quickness.
La décision fut prise avec une rapidité éclair.