Fire

A (usually self-sustaining) chemical reaction involving the bonding of oxygen with carbon or other fuel, with the production of heat and the presence of flame or smouldering.

An instance of this chemical reaction, especially when intentionally created and maintained in a specific location to a useful end (such as a campfire or a hearth fire).

"We sat about the fire singing songs and telling tales."

The occurrence, often accidental, of fire in a certain place, causing damage and danger.

"During hot and dry summers many fires in forests are caused by regardlessly discarded cigarette butts."

The aforementioned chemical reaction of burning, considered one of the Classical elements or basic elements of alchemy.