Not Elsewhere Classified, a phrase used in classification codes such as Standard Industrial Classification, International Standard Classification of Occupations, DSM-IV-TR, DSM-5, ICD-9, and ICD-10.

National Exhibition Centre. The largest exhibition space in the United Kingdom. / National Executive Committee (of a political party).

(astronomy) Initialism of near-Earth comet.

plural of NEC

(medicine, colloquial) Necrotizing fasciitis.

(anatomy) The part of the body connecting the head and the trunk found in humans and some animals. / The corresponding part in some other anatomical contexts.

To hang by the neck; strangle; kill, eliminate. / (chiefly US) To make love; to intently kiss or cuddle; to canoodle. / To drink rapidly. / To decrease in diameter.

(folklore) A shapeshifting water spirit in Germanic mythology and folklore; a nix.

(sexuality) A pathological attraction to dead bodies, especially sexual attraction or intercourse. / (medicine) Pathological fascination with death.

(transitive) To make necessary; to behove; to require (something) to be brought about.