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definition

In philosophy, the specification of the meaning of an expression relative to a language. Definitions may be classified as lexical, ostensive, and stipulative. Lexical definition specifies the meaning of an expression by stating it in terms of other expressions whose meaning is assumed to be known (e.g., a ewe is a female sheep). Ostensive definition specifies the meaning of an expression by pointing to examples of things to which the expression applies (e.g., green is the color of grass, limes, lily pads, and emeralds). Stipulative definition assigns a new meaning to an expression (or a meaning to a new expression); the expression defined (definiendum) may either be a new expression that is being introduced into the language for the first time, or an expression that is already current.

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definition

Optics a measure of the clarity of an optical, photographic, or television image as characterized by its sharpness and contrast

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definition [‚def·ə′nish·ən]

(communications)

The fidelity with which a television or facsimile receiver forms an image.

(electronics)

The extent to which the fine-line details of a printed circuit correspond to the master drawing.

(graphic arts)

The clarity or sharpness of details in a photographic or microfilm image.

(optics)

Lens image clarity or discernible detail.