N

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N,

14th letter of the alphabetalphabet
[Gr. alpha-beta, like Eng. ABC], system of writing, theoretically having a one-for-one relation between character (or letter) and phoneme (see phonetics). Few alphabets have achieved the ideal exactness.
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. It is a usual symbol for a voiced alveolar (or dental) nasal, as in the English not. The diagraph ng represents a different sound, a voiced velar nasal, as in the English sing. The corresponding Greek letter is nu. In chemistry N is the symbol for the element nitrogennitrogen
, gaseous chemical element; symbol N; at. no. 7; interval in which at. wt. ranges 14.00643–14.00728; m.p. −209.86°C;; b.p. −195.8°C;; density 1.25 grams per liter at STP; valence principally −3, +3, or +5.
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N

(mechanics)
(chemistry)

N

1. On drawings, abbr. for “north.”
2. On drawings, abbr. for nail.
3. Symbol for newton.

newton (N)

The unit of force in the International System of Units; the force necessary to produce an acceleration of 1 metre per second-square in a body having a mass of 1 kilogram.

N

(mathematics, programming, jargon)
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".