n. The act of pressing; the exertion of force by pressing; the state of being pressed.n. In mech.: An equilibrated force.n. A force per unit area exerted over the surface of a body or part of a body, and toward the interior of the body.n. Stress in general, being either thrust, pull, or shearing stress. For axis of pressure, conjugate pressure, and other phrases where pressure means stress, see the latter word.n. The action of moral force; exertion of authority or influence; compulsion; a constraining influence or impulse.n. Weight upon the mind; burdensomeness; oppressiveness; also, burden; oppression.n. Urgency; demand on one's time or energies; need for prompt or decisive action: as, the pressure of business.n. Impression; stamp; character impressed.n. Specifically, in hydrostatics, that point of a plane, or of the side of a vessel containing a liquid, to which if a force were applied equal to the total pressure and in the opposite direction, it would exactly balance the total pressure.n. Figuratively, a high degree of mental tension.n. In electricity, a term sometimes used for voltage, electromotive force, or difference of potential.n. In psychology, the specific quality of sensation furnished by the pressure-spots of the skin and by the organs of the articular sensitivity; pressure-sensation.n. The intrinsic pressure K is , where σ is the density of the fluid and (ψ)z is the attraction of an infinite layer of a fluid of unit density, bounded by a plane, upon a unit mass at a distance z from the plane.n. In a compressor, the pressure of the air or gas at the end of the stroke after it is compressed.