Source : Webster's Revised Unabridged Dictionary (1913)

Norm \Norm\, n. [L. norma a rule. See {Normal}, a.]
   1. A rule or authoritative standard; a model; a type.

   2. (Biol.) A typical, structural unit; a type. --Agassiz.

Source : WordNet®

norm
     n 1: a standard or model or pattern regarded as typical; "the
          current middle-class norm of two children per family"
     2: a statistic describing the location of a distribution; "it
        set the norm for American homes" [syn: {average}]

Source : Free On-Line Dictionary of Computing

norm
     
         A real-valued function modelling the length of a
        {vector}.  The norm must be {homogeneous} and {symmetric} and
        fulfil the following condition: the shortest way to reach a
        point is to go straight toward it.  Every {convex} symmetric
        {closed} surface surrounding point 0 introduces a norm by
        means of {Minkowski functional}; all vectors that end on the
        surface have the same norm then.
     
        The most popular norm is the {Euclidean norm}; it is
        calculated by summing up squares of all coordinates and taking
        the square root; this is the essence of {Pythagorus's
        theorem}.  In the infinite-dimensional case, the sum is
        infinite or is replaced with an integral when the number of
        dimensions is {uncountable}.
     
        (1998-07-05)