The Collaborative International Dictionary of English v.0.48:

Not \Not\ [Contr. from ne wot. See 2d Note.]
   Wot not; know not; knows not. [Obs.] --Chaucer.
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The Collaborative International Dictionary of English v.0.48:

Not \Not\, a.
   Shorn; shaven. [Obs.] See Nott.
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The Collaborative International Dictionary of English v.0.48:

Not \Not\, adv. [OE. not, noht, nought, naught, the same word as
   E. naught. See Naught.]
   A word used to express negation, prohibition, denial, or
   refusal.
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         Not one word spake he more than was need. --Chaucer.
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         Thou shalt not steal.                    --Ex. xx. 15.
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         Thine eyes are upon me, and I am not.    --Job vii. 8.
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         The question is, may I do it, or may I not do it? --Bp.
                                                  Sanderson.
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   Not . . . but, or Not but, only. [Obs. or Colloq.]
      --Chaucer.
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WordNet (r) 3.0 (2006):

not
    adv 1: negation of a word or group of words; "he does not speak
           French"; "she is not going"; "they are not friends"; "not
           many"; "not much"; "not at all" [syn: not, non]

The Free On-line Dictionary of Computing (30 December 2018):

NOT

    The Boolean function which is true only if its input
   is false.  Its truth table is:

    A | NOT A
    --+------
    F |   T
    T |   F

   (1996-11-04)