Charles Buck Theological Dictionary 
Pulpit. "The chief characteristics of the eloquence suited to the pulpit are these two gravity and warmth. The serious nature of the subjects belonging to the pulpit requires gravity; their importance to mankind requires warmth. It is far from being either easy or common to unite these characters of eloquence. The Grave, when it is predominant, is apt to run into a dull, uniform solemnity. The warm, when it wants gravity, borders on the theatrical and light. The union of the two must be studied by all preachers, as of the utmost consequence, both in the composition of their discourses, and in their manner of delivery. Gravity and warmth united, form that character of preaching, which the French call onction: the affecting, penetrating, interesting manner, flowing from a strong sensibility of heart in the preacher, the importance of those truths which he delivers, and an earnest desire that they may make full impression on the hearts of his hearers."
See DECLAMATION, SERMONS.
Webster's Dictionary 
(1): ( n.) 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.
(2): ( n.) Fig.: Whatever produces the effect of moving and persuasive speech.
(3): ( n.) That which is eloquently uttered or written.