1.noun(usually in the plural) That which is deserved or merited; a just punishment or reward
2.nounA barren area of land or desolate terrain, especially one with little water or vegetation; a wasteland.
3.nounAny barren place or situation.
4.verbTo leave (anything that depends on one's presence to survive, exist, or succeed), especially when contrary to a promise or obligation; to abandon; to forsake.
"You can't just drive off and desert me here, in the middle of nowhere."
5.verbTo leave one's duty or post, especially to leave a military or naval unit without permission.