Thunder Grey

Thunder

Thunder is the sound caused by lightning. Depending upon the distance from and nature of the lightning, it can range from a long, low rumble to a sudden, loud crack. The sudden increase in temperature and hence pressure caused by the lightning produces rapid expansion of the air in the path of a lightning bolt. In turn, this expansion of air creates a sonic shock wave, often referred to as a "thunderclap" or "peal of thunder". The scientific study of thunder is known as brontology and the irrational fear (phobia) of thunder is called brontophobia.

Grey

Grey or gray is an intermediate color between black and white. It is a neutral or achromatic color, meaning that it has no chroma. It is the color of a rain or storm cloud, of ash, and of lead.

thunder

Noun

1. The loud rumbling, cracking, or crashing sound caused by expansion of rapidly heated air around a lightning bolt.
2. A deep, rumbling noise resembling thunder.

Verb

1. To produce thunder; to sound, rattle, or roar, as a discharge of atmospheric electricity.
2. To make a noise like thunder.

grey

Adjective

1. Commonwealth standard spelling of gray.
2. Synonym of coloured (pertaining to the mixed race of black and white).

Verb

1. Commonwealth standard spelling of gray.