Definition of neces:
(n) :
(US) Initialism of National Electrical Code.
(n) :
(UK) Initialism of National Exhibition Centre, the largest exhibition space in the United Kingdom.
(n) :
(politics) Initialism of National Executive Committee, a leadership body of a political party.
(n) :
(US, rail transport) Initialism of Northeast Corridor. [(rail transport) Amtrak's rail routes from Washington DC to Boston MA.]
(n) :
(explosives industry) Initialism of net explosive content.
(n) :
(astronomy, countable) Initialism of near-Earth comet. [(astronomy) a comet having a period of revolution shorter than 200 years and a perihelion distance smaller than 1.3 au]