What is Treason?

The word “treason” has been thrown around willy-nilly recently in trying to tag President Trump with that label after he met with Russian President Vladimir Putin in Finland, and recently, Federal Judge Emmet Sullivan, in the sentencing hearing in the General Flynn case, mentioned the word treason. Is there any validity to that word being used against President Trump or General Flynn? In the U.S. Constitution it states the following: “Treason against the United States, shall consist only in levying War against them (the U.S.A.) 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”. In addition, the Merriam-Webster definition defines treason as: “The offense of attempting by overt acts to overthrow the government of the State to which the offender owes allegiance”.