i found this defination of treason in

Article III, Section 3 of the U.S. Constitution.

Treason against the United States, 
shall consist only in levying War 
against them, or 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.

The Congress shall have Power to declare 
the Punishment of Treason but, but no 
Attainder of Treason shall work Corruption of Blood, 
or Forfeiture execpt during the Life of the 
Person attainted.