1. A basin or pool, especially one in a church used for washing liturgical vessels or for ritual ablutions.
Usage: ecclesiastical; chiefly historical
2. A swimming pool or bathing pool.
Usage: chiefly archaic or literary

Examples

• The medieval church contained a piscina carved into the stone wall near the altar.
• Priests used the piscina to rinse the chalice and other sacred vessels after Mass.
• The piscina in the sacristy was an essential feature of Catholic church architecture.
• In Roman times, a piscina served as a bathing facility for the wealthy.
• The archaeologists discovered remnants of a piscina beneath the ruins of the villa.