NA
sodium, Na, atomic number
(noun) a silvery soft waxy metallic element of the alkali metal group; occurs abundantly in natural compounds (especially in salt water); burns with a yellow flame and reacts violently in water; occurs in sea water and in the mineral halite (rock salt)
Source: WordNet® 3.1
Etymology 1
Adverb
na (not comparable)
(obsolete) Not.
(obsolete) No.
Etymology 2
Interjection
na
(Geordie) No.
(colloquial) No.
Etymology 3
Abbreviations.
Noun
na
(linguistics) Abbreviation of noun animate.
Symbol
na
nanoamp
Anagrams
• -an, A/N, AN, An, a(n), an, an', an-
Noun
NA (plural NAs)
Initialism of nerve agent.
Proper noun
NA
Initialism of Narcotics Anonymous.
Adjective
NA (not comparable)
(ethnicity) Initialism of Native American.
Anagrams
• -an, A/N, AN, An, a(n), an, an', an-
Source: Wiktionary