Lust [luhst] noun 1. intense sexual desire or appetite. 2. uncontrolled or illicit sexual desire or appetite;lecherousness. 3. a passionate or overmastering desire or craving (usually followed by for): a lust for power. 4. ardent enthusiasm; zest; relish: an enviable lust for life. 5. Obsolete. a. pleasure or delight. b. desire; inclination; wish. Love, lust, isn’t it all the same in the end?