elocution /ˌɛləˈkjuːʃən/ noun Learner's definition of ELOCUTION
[noncount] formal
: the study of how to speak clearly and in a way that is effective and socially acceptable演讲技巧；演说术 — elocutionary
/ˌɛləˈkjuːʃəˌneri/ adjective — elocutionist
/ˌɛləˈkjuːʃənɪst/ noun, plural elocutionists [count]