- National software reuse directory
(NSRD) A directory of reusable software in the ASSET system. (1995-02-03)
- National superannuation
noun 1. (NZ) a means-related pension paid to elderly people
- National theatre
noun 1. the former name of the Royal National Theatre
noun, U.S. Government. 1. an independent agency, created in 1975, that promotes safe transportation in the U.S. through accident investigations, studies, and recommendations. Abbreviation: NTSB.