Main definitions of na in US English:

: na1Na2NA3

na1

adverb

  • ‘I couldna sleep nights’
    Scottish form of not, used after an auxiliary verb

Pronunciation

na

/nə/

Main definitions of na in US English:

: na1Na2NA3

Na2

  • The chemical element sodium.

Origin

From modern Latin natrium.

Main definitions of na in US English:

: na1Na2NA3

NA3

  • 1National Army.

  • 2North America.

  • 3Not applicable.

  • 4Numerical aperture.