The treason of the murthering in the bed. --Chaucer.
Note: In monarchies, the killing of the sovereign, or an
attempt to take his life, is treason. In England, to
imagine or compass the death of the king, or of the
queen consort, or of the heir apparent to the crown, is
high treason, as are many other offenses created by
statute. In the United States, treason is confined to
the actual levying of war against the United States, or
to an adhering to their enemies, giving them aid and
comfort.
2. Loosely, the betrayal of any trust or confidence;
treachery; perfidy.
If he be false, she shall his treason see.
--Chaucer.
{Petit treason}. See under {Petit}.