(historical) A wooden ship set alight and then sent floating into an enemy flotilla, with the aim of spreading the fire among them.

The building where firefighters and fire trucks/fire engines are housed when not answering an alarm.

(US) A public official with police powers responsible for enforcing fire safety regulations, and sometimes, who also investigates suspicious fires.

(obsolete, chemistry) oxygen

(military technology) A kind of missile guidance system which does not require further control after launch, and can hit its target without the launcher being in line of sight of the target.

(chiefly US, informal) Extreme, excessive.

(chiefly US, intensifier, informal) Extremely, thoroughly, very.

A fireproof door designed to stop fires spreading through buildings. / The door of a furnace offering access to the fire inside.

(idiomatic) To begin firing (weapons) at something or someone.

An uncovered fire.