Cecilia, Saint (səsĭl`yə, –sēl–), 2d or 3d cent., Roman virgin martyr. An ancient and famous account of her life is factually valueless. As patron of music, she is represented at the organ. St. Cecilia is the subject of one of the Canterbury Tales, of a song by Dryden, and of an ode by Pope. Cecily is an English form of her name. Feast: Nov. 22.