(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.

(plural only, military) Housing, barracks or other habitation or living space. Compare cuarto. / (by extension) The place where someone or something lives

Third-person singular simple present indicative form of quarter

(physics, dated) Synonym of top quark.

(physics, dated) Synonym of bottom quark.

(physics) A quark having a fractional electric charge of -1/3 and a mass of about 4,100 to 4,400 MeV. / Symbol: b