See Also: NULL(law)
null(dictionary)
null(2)(dictionary)
null(1)(dictionary)
null(medicine)
null mutation(medicine)
lymphocytes, null(medicine)
null cell(medicine)
null cells(medicine)
Null sets(health)

null(1) (iou)



null adjective & noun. LME.
[Old & mod. French nul(le) or Latin nullus, from ne not + ullus any, from unus one.]
A. adjective.
Non-existent, amounting to nothing. Orig. Scots Law. LME.
J. Pinkerton Its influence on that element was absolutely null.
Of no legal or binding force; void, invalid. Freq. in null and void. M16.
A. Thwaite His appointment had been pronounced null and void.
a. Of no value or importance; insignificant, ineffective. L18.
T. R. Malthus We take..pains to weaken and render null the ties of nature.
b. Devoid of character, expression, or distinctive personality. M19.
Chiefly Math. Associated with, producing, or having the value zero; designating or pertaining to a point or region in which no effect or force occurs or in which effects or forces cancel each other out. E19.
b. Math. & Logic. (Of a class or set) having no members; (of a propositional function or relation) not applying in any case, having the null class as its range. E20.
c. Physics. Existing between or joining points in space-time between which the interval is zero. E20.
d. Electricity & Radio. Having no signal present or detectable. E20.
Special collocations: null cone = light cone s.v. LIGHT noun. null hypothesis in a statistical test, the hypothesis that there is no significant difference between specified populations (any apparent difference being due to sampling or experimental error). null space Math. a space composed of all quantities that are transformed into zero by some given transformation.
b. noun.
A nought, a zero. E17.
Cryptography. A meaningless letter or symbol used to impede decipherment. L17.
Electricity & Radio. A condition of no signal; a direction in which no radiation is detected or emitted. Freq. attrib. E20.
nullness noun M20.