Definitions of massive:

• adjective:   imposing in size or bulk or solidity

  Example: "Massive oak doors"

• adjective:   imposing in scale or scope or degree or power

  Example: "Massive retaliatory power"

• adjective:   being the same substance throughout

  Example: "Massive silver"

• adjective:   consisting of great mass; containing a great quantity of matter

  Example: "Earth is the most massive of the terrestrial planets"