You should refer to a dictionary for a more complete definition:
Treason
trē′zən
noun
The betrayal of allegiance toward one’s own country, especially by committing hostile acts against it or aiding its enemies in committing such acts.
The betrayal of someone’s trust or confidence.A betraying; treachery; breach of faith.
Treason as defined by Article 3, Section 3 of our Constitution is not the dictionary's definition.
Article 3, Section 3 reads: "Treason against the United States, shall consist only in levying War against them, or in adhering to their Enemies, giving them Aid and Comfort. No Person shall be convicted of Treason unless on the Testimony of two Witnesses to the same overt Act, or on Confession in open Court."