(military) An officer whose duty is to provide quarters, provisions, storage, clothing, fuel, stationery, and transportation for a regiment or other body of troops, and superintend the supplies.

To act as a quartermaster

(mineralogy) The most abundant mineral on the earth's surface, of chemical composition silicon dioxide, SiO₂. It occurs in a variety of forms, both crystalline and amorphous. Found in every environment.

An incandescent light bulb in which the envelope is made of quartz instead of glass, and the filament is surrounded by an atmosphere of a halogen gas, usually iodine.

(nautical) The aft part of the upper deck of a ship; normally reserved for officers

(intransitive, nautical) To summon the crew of a sailing man-of-war to their stations for action against an enemy. In the Royal Navy the drums were beaten to the rhythm of Heart of Oak.

(sports) One of the four competitions in a knockout tournament whose winners go on to play in the two semifinals.

(American football, Canadian football) An offensive back whose primary job is to pass the ball in a play.

(American football) To play the position of quarterback. / (by extension) To lead a team or group; to be primarily responsible for some group project or activity.

plural of quarter.