An image of Antarctica
differentiating its landmass (dark grey) from its ice shelves
(minimum extent, light grey, and maximum extent, white)
A landmass, or land mass, is a large area of land. The term is often used to refer to lands surrounded by an ocean or sea, such as a continent or a large island.
In the field of geology, a landmass is a defined section of continental crust extending above sea level.