dic ‧ tion /ˈdɪkʃ ə n/ BrE AmE noun [uncountable]
[ Date: 1500-1600 ; Language: Latin ; Origin: dictio 'speaking' , from dicere 'to say' ]
1 . the way in which someone pronounces words
clear/perfect/good etc diction
She had perfect diction.
2 . the choice and use of words and phrases to express meaning, especially in literature