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

      

    neither

     adverb
    adverb
    BrE BrE//ˈnaɪðə(r)//
     
    ; NAmE NAmE//ˈnaɪðər//
     
    ; BrE BrE//ˈniːðə(r)//
     
    ; NAmE NAmE//ˈniːðər//
     
     
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  1. 1  used to show that a negative statement is also true of somebody/something else He didn't remember and neither did I. I hadn't been to New York before and neither had Jane. ‘I can't understand a word of it.’ ‘Neither can I.’ (informal) ‘I don't know.’ ‘Me neither.’
  2. 2  neither… nor… used to show that a negative statement is true of two things I neither knew nor cared what had happened to him. Their house is neither big nor small. Neither the TV nor the DVD player actually work/works.
  3. Word Origin Middle 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