Lust is any intense desire or craving, usually sexual, although it is also common to speak of a "lust for life", "lust for blood (bloodlust for short)", or a "lust for power" or other goals.
As a moral term, lust implies a sexual desire for its own sake, an erotic arousal and wish, or intense physical or sexual attraction or craving.
It is a sin in some religions such as Christianity when it is an excess or inappropriately directed sexual desire (e.g. non-pro creative, unsanctioned, or egocentric sexual desire), and is one of the seven deadly sins, as a sin of excess.
Kama, a concept in Hinduism often translated as lust, is similarly included as one of the Five Evils. The Greek word which translates as lust is epithimia (επιθυμια), which also is translated into English as "to covet".