Initialism of non-native speaker. / Abbreviation of nonsegmented negative-strand.

net neutrality, network neutrality / neural network / nomen nescio / (Philippines) (also nn) Abbreviation of noon.

(astronomy) the prefix of catalog entries in the Gliese star catalog, the expansion called the Preliminary Version of the Third Catalogue of Nearby Stars

(Internet) Not now / No name, an unreleased song without an official title / (Internet) Night night / (video games) Nice nade / (Internet) Netscape Navigator, a former web browser

(law) Abbreviation of notes. / (law) Abbreviation of footnotes.

(in bibliographies) Abbreviation of reporter's notes.

(law) Abbreviation of historical notes.

plural of NNS

plural of NNSE

Initialism of non-native speaker of English.