coal

The definition of coal is a dark brown to black carbon-rich rock that is mined from mountains or below ground and is burned as fuel.

Facts About Turn Coal Into Electricity

The process requires the addition of large amounts of water which is then recycled back into the process.
Coal cannot be burned efficiently in its natural form. It must be pulverized.
Hot air is added to the pulverized coal powder and it is burned. The burning coal heats a boiler which makes steam to power a generator that creates electricity.

(noun)

An example of coal is the fuel used to grill meat on an outdoor grill using briquettes.

See coal in Webster's New World College Dictionary

noun

a kind of dark brown to black, combustible, sedimentary rock resulting from the partial decomposition of vegetable matter away from air and under varying degrees of increased temperature and pressure over a period of millions of years: used as a fuel and in the production of coke, coal gas, water gas, and many coal-tar compounds
a piece (or collectively, pieces) of this rock
a piece of glowing or charred wood, coal, or similar substance; ember
charcoal

Origin: ME & OE col, charcoal, live coal, akin to Ger kohle, ON kol < IE base *g(e)u-lo-, live coal > Ir gual

transitive verb

intransitive verb

to take in a supply of coal

See coal in American Heritage Dictionary 4

noun

a. A natural dark brown to black graphitelike material used as a fuel, formed from fossilized plants and consisting of amorphous carbon with various organic and some inorganic compounds.
b. A piece of this substance.
A glowing or charred piece of solid fuel.
Charcoal.

verb coaled, coal·ing, coals

verb, transitive