A hot tub or whirlpool bath with underwater jets that massage the body.
"The brand name has become an alternative form of jacuzzi when people refer to any hot tub."
Alternative form of jacuzzi
In plain English: A jacuzzi is a hot tub with jets that spray water to give you a relaxing massage.
"We relaxed in the hot tub after our long hike at the jacuzzi resort."
Usage: The term refers specifically to any brand-name hot tub, though it is often used generically as a synonym for a private whirlpool installed in homes rather than public facilities. Avoid using it interchangeably with "bathtub," which typically lacks powerful circulating jets designed for hydrotherapy massage.
To equip with a jacuzzi.
"People often use Jacuzzi as an alternative spelling to refer to a hot tub with jets, even though it is now a brand name rather than a generic term."
Alternative form of jacuzzi
In plain English: To jacuzzi means to relax by soaking your body in hot, bubbling water inside a special tub.
"The large tub began to jacuzzi, churning warm bubbles that filled the room with steam and laughter."
The Jacuzzi brand.
"We decided to install a genuine Jacuzzi in our new bathroom renovation."
The word jacuzzi is a genericized trademark that originally referred to a specific brand of whirlpool bathtubs before coming into common use as a general term for any such tub. It entered English from Italian, derived from its founder's surname, and now describes the type of hydrotherapy fixture rather than just the branded product.