A competition for military supremacy between two powers, especially for the most weapons and the best military technology. / (figuratively) Any similar competition that involves competing developments.

The area within which something may be accessed without moving.

(historical) A heavily-armed mounted member of medieval cavalry.

a light, balanced arm that holds the pickup cartridge on a record player

plural of coat of arms

plural of long arm

(slang, UK) An individual who steals things or borrows them without asking.

plural of sergeant-at-arms

A person charged with keeping order at a meeting.

An injection of a drug into the arm, whether for medical or recreational purposes. / (by extension) A stimulus; a boost in energy, morale, or well-being.