Definitions of tropical:

• adjective:   of weather or climate; hot and humid as in the tropics

  Example: "Tropical weather"

• adjective:   characterized by or of the nature of a trope or tropes; changed from its literal sense
• adjective:   relating to or situated in or characteristic of the tropics (the region on either side of the equator)

  Example: "Tropical islands"

• adjective:   of or relating to the tropics, or either tropic

  Example: "Tropical year"