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

1.
relâmpago, raio
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.
O céu foi iluminado por um súbito clarão de relâmpago.
•
We saw lightning strike a tree in the distance.
Vimos um relâmpago atingir uma árvore à distância.
1.
relâmpago, instantâneo
very fast; with great speed
:
•
He moved with lightning speed to catch the ball.
Ele se moveu com velocidade de relâmpago para pegar a bola.
•
The decision was made with lightning quickness.
A decisão foi tomada com rapidez de relâmpago.