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• na
  na

  adverb

  no.
• Na
  Na

  sodium.
• NA
  NA

  abbreviation

  not applicable. Also n/a
• n/a
  n/a

  abbreviation

  no account.
• N.A.
  N.A.

  abbreviation

  National Army.

na

¹ American  

[nah, nuh] / nɑ, nə /

adverb

1. no.

2. not; in no way; by no means.

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conjunction

1. nor; neither.

Na ² American  

Symbol, Chemistry.

1. sodium.

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NA ³ American  

abbreviation

1. not applicable. Also n/a

2. not available.

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n/a ⁴ American  

abbreviation

1. no account.

2. not applicable. Also NA

3. not available.

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N.A. ⁵ American  

abbreviation

1. National Army.

2. North America.

3. not applicable.

4. Microscopy. numerical aperture.

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NA ¹ British  

abbreviation

1. North America

2. Netherlands Antilles (international car registration)

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Na ² British  

symbol

1. sodium

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na ³ British  

/ nɑː /

determiner

1. a variant of nae

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na ⁴ British  

abbreviation

1. Namibia

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n/a ⁵ British  

abbreviation

1. not applicable

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Etymology

Origin of na¹

before 900; Middle English (north and Scots); in part representing Old English nā ( n ( e ) not, nor + ā ever; cf. ay ¹); in part variant of ne; cf. no ¹

Origin of Na²

From the New Latin word natrium