Definition of unaccounted for adjective from the Oxford Advanced Learner's Dictionary

     

    unaccounted for

     adjective
    adjective
    BrE BrE//ˌʌnəˈkaʊntɪd fɔː(r)//
     
    ; NAmE NAmE//ˌʌnəˈkaʊntɪd fɔːr//
     
    [not before noun]
     
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  1. 1a person or thing that is unaccounted for cannot be found and people do not know what has happened to them or it At least 300 civilians are unaccounted for after the bombing raids.
  2. 2not explained In the story he gave the police, half an hour was left unaccounted for.
See the Oxford Advanced American Dictionary entry: unaccounted for