I think it's a rather pointless question because there are so many ways to define an island. If you say "land surrounded by water," then it's the EurAsiaAfrican

I think it's a rather pointless question because there are so many ways to define an island. If you say "land surrounded by water," then it's the EurAsiaAfrican landmass, if you look at geology (of which I am no expert), then you have a lot more nit-picky defintions such as continents, cratons, crusts, rifts, etc. I just read a lot on Wikipedia, where island is defined as a "sub-continental land surrounded by water"[1]. But when you look at the definition of sub-continental, the continents are "generally identified by convention rather than any strict criteria"[2]. So it's just convention that large islands like Greenland, Madagascar and New Zealand, which are "pieces" of continents, are not considered continents. Some pieces of continents such as New Caledonia[3] are much smaller than volcanic islands that rose out of the sea. For what it's worth, wikipedia follows the norm and calls Greenland the largest island[4]. And then there's the whole issue of sea level which varies, and as it does, it changes the size, shape, and connection of islands and continents. [1] http://en.wikipedia.org/wiki/Island http://en.wikipedia.org/wiki/Island [2] http://en.wikipedia.org/wiki/Continent http://en.wikipedia.org/wiki/Continent [3] http://en.wikipedia.org/wiki/New_caledonia#Geography http://en.wikipedia.org/wiki/New_caledonia#Geography [4] http://en.wikipedia.org/wiki/Geology_of_Greenland http://en.wikipedia.org/wiki/Geology_of_Greenland