nPronunciation: /ɛn/Translate n | into French | into German | into Italian | into Spanish Definition of n abbreviation [in combination] (in units of measurement) nano- (10−9):500 ng Grammar neuter. (n-) [in combination] Chemistry normal (denoting straight-chain hydrocarbons):n-hexane note (used in a book’s index to refer to a footnote):450n Grammar noun. symbol an unspecified or variable number:at the limit where n equals infinitySee also nth.n in other Oxford dictionaries Definition of n in the US English dictionary