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Full-Court Press: When defenders start guarding the offense in the backcourt.

Pressure Characteristic: The pattern of the pressure change during the specified period of time, usually the three hour period preceding an observation. This is recorded in three categories: falling, rising, or steady.

Pressure Gauge: A water level gauge that is operated by the change in pressure at the bottom of a body of water due to the rise and fall of the water level. See gas purged pressure gauge.

Pressure Change: The net difference between the barometric pressure at the beginning and ending of a specified interval of time, usually the three hour period preceding an observation.

Pressure Altitude: The altitude in standard atmosphere at which a given pressure will be observed. It is the indicated altitude of a pressure altimeter at an altitude setting of 29.92 inches of mercury, and is . . . View Full Definition

Pressure: The force per unit area exerted by the weight of the atmosphere above a point on or above the earth's surface.

Pressure Altimeter: An aneroid barometer calibrated to indicate altitude in feet instead of units of pressure. It is read accurately only in a standard atmosphere and when the correct altimeter setting is used.

Pressure Gradient: The amount of pressure change that occurs over a fixed distance at a fixed altitude.

Pressure Jump: A sudden increase in the observed atmospheric pressure or station pressure.

Pressure Tendency: The pressure characteristic and amount of pressure change during a specified time period, usually the three hour period preceding the observation.