NDA
NDA is an abbreviation for:
- National Democratic Alliance , a political party or alliance (in different countries)
- New Drug Application , filing for approval of a new drug with the US Food and Drug Administration (FDA)
- Non-Disclosure Agreement , see confidentiality agreement
- Nuclear Decommissioning Authority , a UK agency that oversees the decommissioning, cleaning and dismantling of nuclear facilities
- Nutrition, Dietetic Products, and Allergies , a scientific body of the EPSA, see European Food Safety Authority
- Sœurs missionnaires de Notre-Dame des Apôtres , a Catholic women's order