[f. CHASTEN v. + -ER1.] One who or that which chastens.
1567. Drant, Horaces Ars P., A vj. A solemne Censor, and chastner of euery younge mans sinne.
1812. Byron, Ch. Har., II. xcviii. Before the Chastener humbly let me bow.
1866. Kingsley, Herew., I. ii. 95. As a wholesome chastener to the pride of success.