Does the definition of tablet include the (non-Fire) Kindle? That could explain the discrepancy between Apple's apparent tablet market share and that I've almos

Does the definition of tablet include the (non-Fire) Kindle? That could explain the discrepancy between Apple's apparent tablet market share and that I've almost never seen a non-iPad tablet in public other than kindles. The kindle reader is sort of in a different market than the iPad though.