World War I.

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

A group of soldiers or paramilitaries detailed to execute someone, usually by rifle shot, or to discharge their weapons ceremonially at a funeral.

The premier of several musicians playing a particular instrument in an orchestra: seated closest to the audience, taking the lead for that instrument's movements, and playing any solos.

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

(idiomatic) A final effort, a final attempt before stopping.

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

The area near a domestic fire or hearth. / (by extension, symbolic) One's home. / (by extension) Home life. / (Mormonism) A supplementary meeting in The Church of Jesus Christ of Latter-day Saints.

(obsolete, chemistry) oxygen

plural of first aid kit