Definition of virtually adverb from the Oxford Advanced Learner's Dictionary

        

    virtually

     adverb
    adverb
    BrE BrE//ˈvɜːtʃuəli//
     
    ; NAmE NAmE//ˈvɜːrtʃuəli//
     
     
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  1. 1  almost or very nearly, so that any slight difference is not important to be virtually impossible Virtually all students will be exempt from the tax. He virtually admitted he was guilty. This year's results are virtually the same as last year's. The red squirrel has become virtually extinct in most of the country.
  2. 2 (computing) by the use of computer software that makes something appear to exist; using virtual reality technology
  3. Extra examples Her fear virtually imprisoned her in her home. The reservoirs are all virtually full. Their lives have been virtually destroyed by this tragedy. This year’s results are virtually the same as last year’s. Virtually all students will be exempt from the tax.
See the Oxford Advanced American Dictionary entry: virtually