lightning/'laɪtnɪŋ/

n. a flash of bright electrical light in the sky during a storm

a. very quick

n. [U] 闪电：The tree was struck by lightning. 这棵树被闪电击中。

◇a storm with thunder and lightning 雷电交加的暴风雨

◇a flash of lightning 一道闪电

a. 闪电的，迅速的：at lightning speed 以闪电般的速度

构词light + n + -ing

音组-ning/-nɪŋ/

lightning; meaning; morning; running; training; warning

用法不能写作lightening。