Na Definition
abbreviation
Nahum.
Webster's New World
Nanoampere.
American Heritage
North America.
Webster's New World
Narcotics Anonymous.
American Heritage
Not applicable.
Webster's New World
interjection
(Geordie) Used to show disagreement or negation.
"Na, yor wrang."
"Na, ye cannet watch telly"
Wiktionary
Used to show agreement with a negative question.
"Divn't yee like milk?" "'Na" (i.e., "No, I don't like milk.")
Wiktionary
(colloquial) No.
Wiktionary