Meaning of World class
Unknown / অজানা / अज्ञात
the earth or globe, considered as a planet.
(often initial capital letter) a particular division of the earth: the Western world.
the earth or a part of it, with its inhabitants, affairs, etc., during a particular period: the ancient world.
humankind; the human race; humanity: The world must eliminate war and poverty.
the public generally: The whole world knows it.