† ˈcastimonyObs.rare—1. [ad. L. castimōnia purity, chastity; ceremonial purity, f.cast-us chaste; see -mony.] Chastity, purity. 1490Caxton Eneydos ix. 37 To make foul the holy purpose of thy castymonye by thuntrue note of lykryke and slypper luxurye.