Lust  —n. 1 strong sexual desire. 2 (usu. Foll. By for, of) passionate desire for or enjoyment of (lust for power; lust of battle). 3 sensuous appetite regarded as sinful (lusts of the flesh). —v. (usu. Foll. By after, for) have a strong or excessive (esp. Sexual) desire.  lustful adj. Lustfully adv. [old english]