The Collaborative International Dictionary of English v.0.48:

Nor \Nor\ (n[^o]r), conj. [OE. nor, contr. from nother. See
   Neither.]
   A negative connective or particle, introducing the second
   member or clause of a negative proposition, following
   neither, or not, in the first member or clause (as or in
   affirmative propositions follows either). Nor is also used
   sometimes in the first member for neither, and sometimes the
   neither is omitted and implied by the use of nor.
   [1913 Webster]

         Provide neither gold nor silver, nor brass, in your
         purses, nor scrip for your journey.      --Matt. x. 9,
                                                  10.
   [1913 Webster]

         Where neither moth nor rust doth corrupt. --Matt. vi.
                                                  20.
   [1913 Webster]

         I love him not, nor fear him.            --Shak.
   [1913 Webster]

         Where neither party is nor true, nor kind. --Shak.
   [1913 Webster]

         Simois nor Xanthus shall be wanting there. --Dryden.
   [1913 Webster]

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

NOR

   Not OR.

   The Boolean function which is true if none of its inputs are
   true and false otherwise, the logical complement of
   inclusive OR.  The binary (two-input) NOR function can be
   defined (written as an infix operator):

   A NOR B = NOT (A OR B) = (NOT A) AND (NOT B)

   Its truth table is:

   	A | B | A NOR B
   	--+---+---------
   	F | F |    T
   	F | T |	   F
   	T | F |    F
   	T | T |    F

   NOR, like NAND, forms a complete set of Boolean functions on
   its own since it can be used to make NOT, AND, OR and any
   other Boolean function:

   NOT A = A NOR A

   A OR B = NOT (A NOR B)

   A AND B = (NOT A) NOR (NOT B)

   (1995-02-06)