The crime of betraying one's country by attempting to overthrow the government or aiding enemies during war.
From Old French traison, ultimately from Latin traditio meaning 'a handing over' or 'betrayal.' The legal concept developed in medieval England as a distinction from ordinary crimes against individuals.
Treason is uniquely defined by each nation's constitution, making it simultaneously the most serious crime and the most politically relative - what's patriotism in one country might be treason in another.
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