Definition of neither determiner from the Oxford Advanced Learner's Dictionary



determiner, pronoun
BrE BrE//ˈnaɪðə(r)//
; NAmE NAmE//ˈnaɪðər//
; BrE BrE//ˈniːðə(r)//
; NAmE NAmE//ˈniːðər//
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 not one nor the other of two things or people Neither answer is correct. Neither of them has/have a car. They produced two reports, neither of which contained any useful suggestions. ‘Which do you like?’ ‘Neither. I think they're both ugly.’ Grammar Pointneither / either After neither and either you use a singular verb:Neither candidate was selected for the job. Neither of and either of are followed by a plural noun or pronoun and a singular or plural verb. A plural verb is more informal:Neither of my parents speaks/​speak a foreign language. When neither… nor… or either… or… are used with two singular nouns, the verb can be singular or plural. A plural verb is more informal. Word OriginMiddle English: alteration (by association with either) of Old English nawther, contraction of nāhwæther (from ‘no’ + hwæther ‘whether’).
See the Oxford Advanced American Dictionary entry: neither