desert (Noun) — Arid land with little or no vegetation.
desert (Verb) — Leave someone who needs or counts on you; leave in the lurch. ex. "The mother deserted her children"
desert (Verb) — Leave (a cause, a country or an army), often in order to join the opposing cause, country, or army. ex. "If soldiers deserted Hitler's army, they were shot"
desert (Verb) — Leave behind. ex. "the students deserted the campus after the end of exam period"