Definition of onerous adjective from the Oxford Advanced American Dictionary

     

    onerous

     adjective
    adjective
    NAmE//ˈɑnərəs//
     
    , NAmE//ˈoʊnərəs//
     
    (formal)
     
    jump to other results
  1. 1needing great effort; causing trouble or worry synonym taxing
  2. 2 an onerous duty/task/responsibility
See the Oxford Advanced Learner's Dictionary entry: onerous