| Acronym | Definition |
|---|
| NA➣Not Available |
| NA➣Not Applicable |
| NA➣Natrium (Sodium) |
| NA➣North America |
| NA➣National Association |
| NA➣Nada |
| NA➣No Answer |
| NA➣National Assembly |
| NA➣Native American |
| NA➣National Archives |
| NA➣Non Turbo (auto) |
| NA➣National Academy |
| NA➣Namibia (ISO country code, top level domain) |
| NA➣Narcotics Anonymous |
| NA➣Not Authorized |
| NA➣Nurse Assistant |
| NA➣National Alliance (white supremacist group) |
| NA➣Natural Area (Virginia Parks Department) |
| NA➣Netherlands Antilles |
| NA➣Nauru (South Pacific country) |
| NA➣Neighborhood Association |
| NA➣Network Adapter |
| NA➣Numerical Aperture |
| NA➣Not Approved |
| NA➣Needs Assessment |
| NA➣numerical analysis |
| NA➣Next Action |
| NA➣Not Acceptable |
| NA➣Nucleic Acid |
| NA➣Northern Areas (Pakistan) |
| NA➣Non-Alcoholic |
| NA➣No Ass |
| NA➣No Account |
| NA➣Naval Academy |
| NA➣National Account |
| NA➣No Action |
| NA➣Network Analysis |
| NA➣No Access |
| NA➣Naturally Aspirated |
| NA➣Network Administration |
| NA➣Noradrenaline |
| NA➣No Authority |
| NA➣Naughty America |
| NA➣Not Assigned |
| NA➣National Academies |
| NA➣Needle Aspiration (biopsy) |
| NA➣Naval Aviator (US Navy) |
| NA➣Nerikes Allehanda (Sweden) |
| NA➣Not Analyzed |
| NA➣Network Appliance |
| NA➣No Audio |
| NA➣Nuclear Assault (band) |
| NA➣Nambia (Africa) |
| NA➣Northern Alliance (Afghani resistance to the Taliban) |
| NA➣Naval Architect |
| NA➣Normally Aspirated |
| NA➣Novice Agility (AKC title) |
| NA➣Avogadro's Number (chemistry, equal to 6.022e23/Mol; sometimes written as N-Sub-A) |
| NA➣No Alarm |
| NA➣Not Alarmed |
| NA➣Negative Approach (band) |
| NA➣Neuroblastoma Cell |
| NA➣Natural Adaptation (evolutionary computing) |
| NA➣Non-Attainment |
| NA➣Naval Aircraft |
| NA➣Nigerian Army |
| NA➣Normal Adaptation (evolutionary computing) |
| NA➣Narcóticos Anónimos |
| NA➣Naval Attaché |
| NA➣Naruto Arena (game) |
| NA➣No Acknowledgment |
| NA➣Narcotic Addiction |
| NA➣Napoli - Naples (Campania, Italy) |
| NA➣Never Available |
| NA➣Neutral Axis |
| NA➣Negative Affectivity |
| NA➣Neuróticos Anónimos (Portugese, Guatemala self help group) |
| NA➣National Access |
| NA➣Normal Academic |
| NA➣Neuraminadase (glycoprotein on influenza virus) |
| NA➣Naming Authority |
| NA➣Nanoampere |
| NA➣Narcotiques Anonymes (Québec) |
| NA➣North Allegheny School District (Pittsburgh, Pennsylvania) |
| NA➣Ninja Assassins (gaming clan) |
| NA➣New Adventures of He-Man (cartoon) |
| NA➣National Amusements Inc. |
| NA➣Network Aspects |
| NA➣Negative Atmosphere |
| NA➣Neo America |
| NA➣Nurse Associate |
| NA➣Nigerian Airways |
| NA➣New Assyrian |
| NA➣Node Authentication |
| NA➣Normal Approval |
| NA➣Nitric Anhydride |
| NA➣No Acronyms |
| NA➣Normal to Abnormal |
| NA➣Noctem Aeternus (role playing game) |
| NA➣Network Auditor |
| NA➣Noob Alert (gaming) |
Na - 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)