Noun tiger has 2 senses
  1. tiger - a fierce or audacious person; "he's a tiger on the tennis court"; "it aroused the tiger in me"
    --1 is a kind of
    person, individual, someone, somebody, mortal, human, soul
  2. tiger, Panthera tigris - large feline of forests in most of Asia having a tawny coat with black stripes; endangered
    --2 is a kind of big cat, cat
    --2 is a member of Panthera, genus Panthera
    --2 has particulars: Bengal tiger; tigress