By poetic Diction we mean the choice and arrangement of words so as to achieve the desired effect. It differs according to the subject, the literary form, and the age in which a particular work is written.
In every age poets have developed their own poetic diction which markedly differs from the speech of everyday life. In good poets, poetic diction varies according to the character who is supposed to be speaking at a particular moment, i.e., it is in character.