Definition of viable adjective from the Oxford Advanced American Dictionary

     

    viable

     adjective
    adjective
    NAmE//ˈvaɪəbl//
     
     
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  1. 1 that can be done; that will be successful synonym feasible a viable option/proposition There is no viable alternative. to be commercially/politically/financially/economically viable If there is any delay, the rescue plan will cease to be viable.
  2. 2(biology) capable of developing and surviving independently viable organisms
NAmE//ˌvaɪəˈbɪlət̮i//
 
noun [uncountable] commercial viability
See the Oxford Advanced Learner's Dictionary entry: viable