guard band

(radio, telecommunications) An unused part of the radio spectrum between bands, for the purpose of preventing interference.

The unrecorded space between tracks on magnetic tape or other media which prevents the signals on adjacent tracks from interfering with each other.

(computer graphics) A virtual area of the screen, bordering the real screen, to which any rendering is ignored, used to simplify clipping.

(quality control) The amount by which minimum product specifications are increased to ensure that, even with measurement uncertainty, the product will meet the minimum specifications with a specified level of confidence.