NULL

I. adjective see: no Date: circa 1567 having no legal or binding force ; invalid , amounting to nothing ; nil , having no value ; insignificant , 4. having no elements , having zero as a limit , having all elements equal to zero, 5. indicating usually by a zero reading on a scale when a given quantity (as current or voltage) is zero or when two quantities are equal, being or relating to a method of measurement in which an unknown quantity (as of electric current) is compared with a known quantity of the same kind and found equal by a ~ detector, of, being, or relating to zero, zero 1c, II. noun Date: 1605 zero 3a(1), 2. a condition of a radio receiver when minimum or zero signal is received, a minimum or zero value of an electric current or of a radio signal, III. transitive verb Date: 1643 to make ~