1. a building or indoor facility containing a swimming pool
Usage: formal or institutional usage; often used in the names of public or university facilities

Examples

• The university's new natatorium features Olympic-sized pools and diving platforms.
• The city invested in a modern natatorium to serve the community.
• The natatorium was closed for renovations during the summer.
• Students can access the natatorium during designated hours.
• The natatorium hosts regional swimming competitions.