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Null

nʌl

Null definitions
adjective
null
  1. having no legal or binding force; invalid

    "the court ruled that the contract contained several infringements and therefore declared it null and void"

    invalid null and void void
  2. having or associated with the value zero
    • (of a set or matrix) having no elements, or only zeros as elements
  3. lacking distinctive qualities; having no positive substance or content

    "his curiously null life"

noun
null nulls
  1. a zero
  2. a dummy letter in a cipher
  3. a condition of no signal
    • a direction in which no electromagnetic radiation is detected or emitted
verb
null nulled nulling nulls
  1. combine (a signal) with another in order to create a null; cancel out

    "the tumour can be more readily identified by nulling the high signal from bone marrow"