(idiomatic) Incredibly fast.

Intracloud lightning; lightning which occurs within a cloud, resulting in the discharge of electricity between regions of the cloud. (Often, but not always, this takes the form of sheet lightning.)

(meteorology) A system that displays a map of the position of recorded or real-time lightning discharges relative to the user or other objects.

plural of upward lightning

(astronomy, meteorology) An upper-atmospheric optical phenomenon associated with thunderstorms, in which the lightning bolt projects straight into the upper atmosphere.

Cloud-to-ground lightning; lightning which connects (attaches) to the ground; lightning which results in the discharge of electricity between a cloud and the ground.

A broad flash of lightning, with no visible bolt, due to reflection.

A metallic conductor that is attached to a high point of a building and leads to the ground and protects the building from damage by lightning.

A device that provides an alarm to inform its user(s) that lightning has occurred nearby. Specific devices are available for a variety of applications.

A metallic conductor that is attached to a high point of a building and leads to the ground to protect the building from damage by lightning.