nounpl. -·ri·ums or -·ria
- a swimming pool, esp. one indoors
- a building or facility housing a large swimming pool
Origin of natatoriumLate Latin from natatorius: see natatorial
An indoor swimming pool.
Origin of natatoriumLate Latin natātōrium place for swimming from neuter of Latin natātōrius of swimming from natātus act of swimming from past participle of natāre frequentative of nāre to swim ; see natatorial .
(plural natatoriums or natatoria)
- (US) A swimming pool, especially an indoor one.
From Late Latin natatorium, noun use of the neuter singular of Latin natatorius "˜natatory, for swimming'.