1. Contrary to or rejected by orthodox religious doctrine; involving heresy
The priest condemned the heretical teachings as blasphemous.
O padre condenou os ensinamentos heréticos como blasfêmia.
2. Holding or expressing unorthodox or controversial opinions, especially in a non-religious context
His heretical ideas about economics challenged traditional market theory.
Suas ideias heréticas sobre economia desafiaram a teoria tradicional de mercado.