Meaning of NULL in English

NULL

I. ˈnəl adjective

Etymology: Anglo-French nul, literally, not any, from Latin nullus, from ne- not + ullus any; akin to Latin unus one — more at no , one

Date: circa 1567

1. : having no legal or binding force : invalid

2. : amounting to nothing : nil

3. : having no value : insignificant

4.

a. : having no elements

null set

b. : having zero as a limit

null sequence

c. of a matrix : having all elements equal to zero

5.

a. : 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 — used of an instrument

b. : 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 null detector

6. : of, being, or relating to zero

7. : zero 1c

II. 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

III. transitive verb

Date: 1643

: to make null

Merriam-Webster's Collegiate English vocabulary.      Энциклопедический словарь английского языка Merriam Webster.