Fluent, forcible, elegant, and persuasive speech in public; the power of expressing strong emotions in striking and appropriate language either spoken or written, thereby producing conviction or persuasion.
Fig.: Whatever produces the effect of moving and persuasive speech.
I promised myself that I would write as well as I can, tell the truth, not to tell everything I know, but to make sure that everything I tell is true, as I understand it. And to use the eloquence which my language affords me. Maya Angelou