An undermount sink is a sink installed below the countertop rather than dropped in from above. This structure creates a clean edge between the sink and the counter surface, so water, crumbs, and daily mess can be wiped directly into the bowl without catching on a raised rim.

​An undermount sink is a type of sink that is installed beneath the countertop surface, rather than sitting on top like a traditional drop-in model. This design creates a clean, seamless transition between the countertop and the sink, making it a popular choice in modern kitchens and bathrooms.