Treason is the crime of attacking a state authority to which one owes allegiance.

What does mean treasonous?

: the offense of attempting to overthrow the government of one's country or of assisting its enemies in war specifically : the act of levying war against the United States or adhering to or giving aid and comfort to its enemies by one who owes it allegiance. Other Words from treason. treasonous \ -​əs \ adjective.

What is a traitorous act?

disloyal to their country traitorous implies either actual treason or a serious betrayal of trust. traitorous acts punishable by death treacherous implies readiness to betray trust or confidence.