1. The quality or state of being warm; gentle heat; as, the warmth of the sun; the warmth of the blood; vital warmth. Here kindly warmth their mounting juice ferments. (Addison)
2. A state of lively and excited interest; zeal; ardor; fervor; passion; enthusiasm; earnestness; as, the warmth of love or piety; he replied with much warmth. Spiritual warmth, and holy fires. That warmth . . . Which agrees with Christian zeal. (sprat)
3. The glowing effect which arises from the use of warm colours; hence, any similar appearance or effect in a painting, or work of colour.
Synonym: Zeal, ardor, fervor, fervency, heat, glow, earnestness, cordiality, animation, eagerness, excitement, vehemence.