meritorious UK /ˌmɛɹɪˈtɔːɹɪ.əs/US /ˌmɛɹɪˈtɔɹi.əs/ adjective1 •Deserving of merit or commendation; deserving reward.The policeman received the Award of Meritorious Service from his grateful department. formsmore meritorious · most meritorious