• A gradual reduction in the thickness, width, or diameter of an object or section. Also, the overall reduction in thickness, width, or diameter, per unit length.
  • A gradual reduction in intensity or amplitude. Also, the rate of such a reduction per unit time, length, or the like.
  • A uniform rate of change in a property which is proportional to a change in a mechanical position or setting such as rotation or length. For example, the changes in resistance in a potentiometer as a sliding tap is moved, or a change in the cross section of a waveguide.

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