Pressure

Part of speech: noun (n.)

1. The act of pressing, or the condition of being pressed; compression; a squeezing; a crushing; as, a pressure of the hand.

2. A contrasting force or impulse of any kind; as, the pressure of poverty; the pressure of taxes; the pressure of motives on the mind; the pressure of civilization. Where the pressure of danger was not felt. Macaulay.

3. Affliction; distress; grievance. My people's pressures are grievous. Eikon Basilike. In the midst of his great troubles and pressures. Atterbury.

4. Urgency; as, the pressure of business.

5. Impression; stamp; character impressed. All saws of books, all forms, all pressures past. Shak.

6. The action of a force against some obstacle or opposing force; a force in the nature of a thrust, distributed over a surface, often estimated with reference to the upon a unit's area. Atmospheric pressure, Center of pressure, etc. See under Atmospheric, Center, etc. -- Back pressure (Steam engine), pressure which resists the motion of the piston, as the pressure of exhaust steam which does not find free outlet. -- Fluid pressure, pressure like that exerted by a fluid. It is a thrust which is normal and equally intense in all directions around a point. Rankine. -- Pressure gauge, a gauge for indicating fluid pressure; a manometer.