- of, pertaining to, proceeding from, or expressive of penitence or repentance.
- a penitent.
- a book or code of canons relating to penance, its imposition, etc.
- of, showing, or constituting penance
- mainly RC Church a book or compilation of instructions for confessors
- a less common word for penitent (def. 2), penitent (def. 3)
adj.c.1500, from Medieval Latin penitentialis, from Latin paenitentia “repentance” (see penitence).