A large landmass which is either smaller than a continent (such as Greenland), or part of an even larger continent (such as the Indian subcontinent)
A subcontinent is part of a larger continent, made up of a number of countries that form a large mass of land. The subcontinent is often used to refer to the area that contains India, Pakistan, and Bangladesh
a large and distinctive landmass (as India or Greenland) that is a distinct part of some continent
{i} large land mass that is part of a continent but has a certain amount of geographical or political independence; large land mass that is smaller than a continent