(usu null and void) having no force in law; invalid
amounting to nothing; nil
without character or distinction
intellectually null
in mathematics:
= empty1 (4)
having zero as a limit
null sequence
said of a matrix: having all the elements equal to zero
said of an electrical instrument: indicating, e.g. by a zero reading on a scale, when current or voltage is zero
relating to or denoting a method of measurement in which an unknown quantity, e.g. of electric current, is compared with a known quantity of the same kind and found equal by a null instrument
[French nul not any, from Latin nullus, from ne- not + ullus any]