Lightning in angular, zigzag, or forked flashes.

Lightning that occurs too far away for the resulting thunder to be audible by the observer.

(idiomatic) A difficult or challenging feat, particularly to attempt such a feat. / (idiomatic) Great, unlikely, fleeting success, particularly entrepreneurial or in the media.

lightning arrester

A device used on electrical and telecommunications systems to protect the insulation and conductors from the damaging effects of lightning. Typically, it has a high-voltage terminal and a ground terminal. When a surge travels along the power line to the arrester, the current from the surge is diverted through the arrester, in most cases to earth.

(idiomatic) Extremely quickly.

(idiomatic) Extremely fast, fast as lightning.

A very short verbal presentation given at a conference etc., usually one of a series delivered by different speakers.

plural of lightning talk

plural of lightning arrester