Meaning of NULL in English

NULL

adj.

Function: noun

Date: 1605

1 : ZERO 3A(1)

2 a : a condition of a radio receiver when minimum or zero signal is received b : a minimum or zero value of an electric current or of a radio signal

Merriam Webster Collegiate English Dictionary.      Merriam Webster - Энциклопедический словарь английского языка.