feasibility studynoun [ C ] uk ​ /ˌfiː.zəˈbɪl.ɪ.ti ˈstʌd.i/ us ​ /ˌfiː.zəˈbɪl.ə.t̬i ˈstʌd.i/. › an examination of a situation to decide if a suggested method, plan, or piece of work is possible or reasonable: The local authority is to carry out a feasibility study into expanding the old stadium.