ˌek.sɪˈkjuː.ʃən ˌɪmplɪmənˈteɪʃn ˌɪmpləmənˈteɪʃən pəɹ.ˈfɔɹ.məns the act of performing; of doing something successfully; using knowledge as distinguished from merely possessing it they criticized his performance as mayor experience generally improves performance the act of accomplishing some aim or executing some order the agency was created for the implementation of the policy