See also: Appendix:Variations of "na" English Noun N.A. (banking, US) Initialism of national association – a national bank, as defined in the National Banking Act Citibank, N.A. (linguistics) Abbreviation of numerary adjunct. Coordinate terms FSB Anagrams -an, A/N, AN, An, a(n), an, an', an-Wikiwand - on Seamless Wikipedia browsing. On steroids.