1. The
continent of
Asia is defined by subtracting
Europe and
Africa
from the great land mass of
Africa-Eurasia. The boundaries are vague: Asia and Africa
meet somewhere near the
Suez Canal. The boundary between Asia and Europe is placed at
Istanbul and somewhere along the
Ural Mountains. See also
Eurasia.
2. The region of Asia is the continent of Asia plus nearby islands.
Subregions of Asia include: