Pressure (symbol: P) is the force per unit area applied in a direction perpendicular to the surface of an object. Gauge pressure is the pressure relative to the local atmospheric or ambient pressure.
Pressure is an effect which occurs when a force is applied on a surface. Pressure is the amount of force acting on a unit area. The symbol of pressure is P.
Pressure is a tensor quantity, and has SI units of pascal; 1 Pa = 1 N/m2, and has EES units of psi; 1 psi = 1 lb/in2.
Pressure is transmitted to solid boundaries or across arbitrary sections of fluid normal to these boundaries or sections at every point. It is a fundamental parameter in thermodynamics and it is conjugate to volume.
The only technique for accelerating the natural trend of social evolution is that of applying spiritual pressure from above, thus augmenting moral insight while enhancing the soul capacity of every mortal to understand and love every other mortal. Mutual understanding and fraternal love are transcendent civilizers and mighty factors in the world-wide realization of the brotherhood of man.(52:6.7)