The Collaborative International Dictionary of English v.0.48:

N \N\ ([e^]n),
   the fourteenth letter of English alphabet, is a vocal
   consonent, and, in allusion to its mode of formation, is
   called the dentinasal or linguanasal consonent. Its commoner
   sound is that heard in ran, done; but when immediately
   followed in the same word by the sound of g hard or k (as in
   single, sink, conquer), it usually represents the same sound
   as the digraph ng in sing, bring, etc. This is a simple but
   related sound, and is called the gutturo-nasal consonent. See
   Guide to Pronunciation, [sect][sect] 243-246.
   [1913 Webster]

   Note: The letter N came into English through the Latin and
         Greek from the Phoenician, which probably derived it
         from the Egyptian as the ultimate origin. It is
         etymologically most closely related to M. See M.
         [1913 Webster]

The Collaborative International Dictionary of English v.0.48:

N \N\, n. (Print.)
   A measure of space equal to half an M (or em); an en.
   [1913 Webster]

The Collaborative International Dictionary of English v.0.48:

Valiant \Val"iant\, a. [OE. valiant, F. vaillant, OF. vaillant,
   valant, originally p. pr. of OF. & F. valoir to be worth, L.
   valere to be strong. See Wield, and cf. Avail,
   Convalesce, Equivalent, Prevail, Valid.]
   [1913 Webster]
   1. Vigorous in body; strong; powerful; as, a valiant fencer.
      [Obs.] --Walton.
      [1913 Webster]

   2. Intrepid in danger; courageous; brave.
      [1913 Webster]

            A valiant and most expert gentleman.  --Shak.
      [1913 Webster]

            And Saul said to David . . . be thou valiant for me,
            and fight the Lord's battles.         --1 Sam.
                                                  xviii. 17.
      [1913 Webster]

   3. Performed with valor or bravery; heroic. "Thou bearest the
      highest name for valiant acts." --Milton.
      [1913 Webster]

            [The saints] have made such valiant confessions.
                                                  --J. H.
                                                  Newman.
      [1913 Webster] -- Val"iant*ly, adv. -- Val"iant*ness,
      n.
      [1913 Webster]

The Collaborative International Dictionary of English v.0.48:

York use \York" use`\ (Eccl.)
   The one of the three printed uses of England which was
   followed in the north. It was based on the Sarum use. See
   Use, n., 6. --Shipley.
   [1913 Webster]

WordNet (r) 3.0 (2006):

N
    n 1: a common nonmetallic element that is normally a colorless
         odorless tasteless inert diatomic gas; constitutes 78
         percent of the atmosphere by volume; a constituent of all
         living tissues [syn: nitrogen, N, atomic number 7]
    2: the cardinal compass point that is at 0 or 360 degrees [syn:
       north, due north, northward, N]
    3: a unit of force equal to the force that imparts an
       acceleration of 1 m/sec/sec to a mass of 1 kilogram; equal to
       100,000 dynes [syn: newton, N]
    4: (of a solution) concentration expressed in gram equivalents
       of solute per liter [syn: normality, N]
    5: the 14th letter of the Roman alphabet [syn: N, n]

The Jargon File (version 4.4.7, 29 Dec 2003):

N
 /N/, quant.

    1. A large and indeterminate number of objects: ?There were N bugs in that
    crock!? Also used in its original sense of a variable name: ?This crock has
    N bugs, as N goes to infinity.? (The true number of bugs is always at least
    N + 1; see Lubarsky's Law of Cybernetic Entomology.)

    2. A variable whose value is inherited from the current context. For
    example, when a meal is being ordered at a restaurant, N may be understood
    to mean however many people there are at the table. From the remark ?We'd
    like to order N wonton soups and a family dinner for N - 1? you can deduce
    that one person at the table wants to eat only soup, even though you don't
    know how many people there are (see great-wall).

    3. Nth: adj. The ordinal counterpart of N, senses 1 and 2.

    4. ?Now for the Nth and last time...? In the specific context ?Nth-year
    grad student?, N is generally assumed to be at least 4, and is usually 5 or
    more (see tenured graduate student). See also random numbers, 
    two-to-the-N.


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

N

    A variable typically used
   to stand for a number of objects.

   Used unqualified in speech it suggests a large, undetermined
   number, e.g. "There were N bugs in that crock!", or a
   number implied by context, e.g. "Let's get pizza for N + 1".

   [Jargon File]

   (2006-04-18)