Definition of Aquinas, St. Thomas in English:
( 1225–74), Italian philosopher, theologian, and Dominican friar; known as the Angelic Doctor. He is regarded as the greatest figure of scholasticism. One of his most important achievements was the introduction of the work of Aristotle to Christian western Europe. His works include commentaries on Aristotle as well as the Summa Contra Gentiles and Summa Theologiae. Feast day, January 28.