An area of land that is not built upon, but reserved by the national government for recreational use.

(dated) atomic theory

(Britain) Alternative spelling of massage parlor

A place where clients can pay for a massage. / A place that offers a happy ending (a hand job) after the massage; a front organization for a brothel.

Having self-contradictory properties.

(physics) The study of the motion of individual particles.

A commercially-operated collection of rides, games and other entertainment attractions.

A group of people assembled to carry out a military attack.

(physics) The sum of a particle's potential energy and kinetic energy

A component of any manufactured goods, kept in reserve to replace one that fails; a spare.