the offense of acting to overthrow one's government or to harm or kill its sovereign.
2.
a violation of allegiance to one's sovereign or to one's state.
3.
the betrayal of a trust or confidence; breach of faith; treachery.
Origin: 1175–1225; ME tre(i)so(u)n < AF; OF traïson < L trāditiōn- (s. of trāditiō) a handing over, betrayal. See tradition
Synonyms: 1.Treason, sedition mean disloyalty or treachery to one's country or its government. Treason is any attempt to overthrow the government or impair the well-being of a state to which one owes allegiance; the crime of giving aid or comfort to the enemies of one's government. Sedition is any act, writing, speech, etc., directed unlawfully against state authority, the government, or constitution, or calculated to bring it into contempt or to incite others to hostility, ill will or disaffection; it does not amount to treason and therefore is not a capital offense. 2.See disloyalty.
Violation of allegiance toward one's country or sovereign, especially the betrayal of one's country by waging war against it or by consciously and purposely acting to aid its enemies.
A betrayal of trust or confidence.
[Middle English, from Anglo-Norman treson, from Latin trāditiō, trāditiōn-, a handing over; see tradition.]
c.1225, from Anglo-Fr. treson, from O.Fr. traison (11c.; Fr. trahison), from L. traditionem (nom. traditio) "a handing over, delivery, surrender" (see tradition). O.Fr. form influenced by the verb trair "betray." In old English law, high treason is violation by a subject of his allegiance to his sovereign or to the state; distinguished from petit treason, treason against a subject, such as murder of a master by his servant.
Main Entry: trea·son Pronunciation: 'trEz-&noun Function: noun Etymology: Anglo-French treison crime of violence against a person to whom allegiance is owed, literally, betrayal, from Old French traïson, from traïr to betray, from Latin tradere to hand over, surrender : 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 —trea·son·ous/-&s/adjective