Definitions of greedy:

• adjective:   wanting to eat or drink more than one can reasonably consume

  Example: "Don't be greedy with the cookies"

• adjective:   (often followed by `for') ardently or excessively desirous

  Example: "Greedy for fame"

• adjective:   immoderately desirous of acquiring e.g. wealth

  Example: "Greedy for money and power"