Dictionary 1. (a.) Of or pertaining to, or used for, purification; as, lustral days; lustral water.2. (a.) of or pertaining to a lustrum. Thesaurus abstergent apologetic ascetic atoning cathartic cleaning cleansing compensational compensatory depurative detergent diuretic emetic expiatory expurgatory lustrational lustrative penitential piacular propitiatory purgative purgatorial purging purificatory purifying reclamatory recompensing redeeming redemptive redressing reparative reparatory repentant repenting restitutional restitutive restitutory righting satisfactional squaring |