Verb form of the noun lightning - the act of lightning occuring or being produced.
"It was thundering and lightninging outside, I got so scared that I peed the bed."
by benjamin hammond January 31, 2006
The process of lightning happening outside.
Ex: To bowl, is bowling. To play, is playing. To lighning, is lightninging!!! YES!!!
by Bokes September 13, 2004