A person who rebels against authority or betrays the ruler; a rebel or traitor.
歴史小説では反逆者が英雄視されることもある。
In historical novels, rebels are sometimes depicted as heroes.
王に対して反逆した者は反逆者と呼ばれた。
Those who rebelled against the king were called traitors (rebels).
彼は仲間から裏切り者として反逆者扱いされた。
He was treated as a traitor by his comrades and labeled a rebel.