When a substance supersaturates, it becomes more concentrated than it can normally be.
Supersaturating something is usually done on purpose, like when you add a lot of sugar to water to make it supersweet.
Examples:
If you add a lot of sugar to your drink, it supersaturates the water.
The air in the room supersaturates with moisture when you take a hot shower.
She supersaturates the solution with salt to see what happens.
The room quickly supersaturates with the smell of fresh cookies.
The market quickly supersaturates with new products during the holiday season.
The excitement in the room supersaturates the air, making everyone feel happy.