For Threshold we have terms and definitions in 11 topics. The topics are Architecture, Computer Virus, Construction, Environment, Etymology, Geography, Home, Photography, Physical Geography, Scanner and Speleological.

Threshold (Architecture)

The wooden or metal strip directly beneath an exterior door. Some have an added rubber or plastic strip feature for better weatherstripping.

Threshold (Computer Virus)

The number of events that satisfy certain criteria. Administrators define threshold rules to determine how notifications are to be delivered.

Threshold (Construction)

The bottom metal or wood plate of an exterior door frame. Generally they are adjustable to keep a tight fit with the door slab.

Threshold (Environment)

The dose or exposure level below which a significant adverse effect is not expected.

Threshold (Etymology)

"Threshold" originated in the middle ages when houses with stone floors were covered with threshings to keep the floor warm and to prevent it from being slippery. As threshings were added during the winter, they would be scattered and thinned near the door, so people added a wooden board to hold the threshings in -- a threshold. The OED defines threshold originally as, "The piece of timber or stone which lies below the bottom of a door, and has to be crossed in entering a house; the sill of a doorway; hence, the entrance to a house or building.

Threshold (Geography)

The minimum-sized market for an economic activity. The activity will not be successful until it can reach a population larger than this threshold size.

Threshold (Home)

A strip of metal, wood, marble or other material placed at the base of a door.

Threshold (Photography)

The point at which an action begins or change. The threshold setting used in scanning line art determines which pixels are converted to black and which will become white. The threshold defined in the USB process determines how large a tonal contrast must be before sharpening will be applied to it.

Threshold (Physical Geography)

The level of magnitude of a system process at which sudden or rapid change occurs.

Threshold (Scanner)

The point at which an action begins or changes. The threshold setting used in scanning line art determines which pixels are converted to black and which will become white. The threshold defined in the USM process determines how large a tonal contrast must be before sharpening will be applied to it.

Threshold (Speleological)

That part of a cave near the entrance where surface climatic conditions rapidly grade into cave climatic conditions. Not necessarily identical with twilight zone.
Cave - Parts of.

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