abbreviation

• 1in combination (in units of measurement) nano- (10⁻⁹)

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  • ‘500 ng’

• 2Grammar
  in combination Neuter.

• 3

  (also n-)

  Chemistry
  in combinationin combination Normal (denoting straight-chain hydrocarbons)

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  • ‘n-hexane’

• 4in combination Note (used in a book's index to refer to a footnote)

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  • ‘450n’

• 5Grammar
  in combination Noun.

• An unspecified or variable number.

  See also nth

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  • ‘at the limit where n equals infinity’

nounNs, N's

• 1The fourteenth letter of the alphabet.

  See also en

  1. 1.1Denoting the next after M in a set of items, categories, etc.

abbreviation

• 1(used in recording moves in chess) knight.

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  • ‘17.Na4?’

• 2(on a gear lever) neutral.

• 3(chiefly in place names) New.

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  • ‘N Zealand’

• 4Physics
  Newton(s).

• 5Chemistry
  (with reference to solutions) normal.

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  • ‘the pH was adjusted to 7.0 with 1 N HCl’

• 6North or Northern.

  ‘78° N’

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  • ‘N Ireland’

• 7Norway (international vehicle registration).

• 8Nuclear.

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  • ‘the N bomb’

• The chemical element nitrogen.