warmthn.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.(Jer. Taylor.)That warmth . . . which agrees with Christian zeal. (Sprat.)3. (Paint.) The glowing effect which arises from the use of warm colors; hence, any similar appearance or effect in a painting, or work of color.()()