"ritual washing," late 14c., from Latin ablutionem (nominative ablutio), noun of action from past participle stem of abluere "to wash off," from ab- "off" (see ab-) + luere "wash," related to lavere (see lave).
1. His daily ablution were always accompanied by loud noise.
2. OBJECTIVE To prepare acne I ablution for treating all kinds of acnes.