It means that the received package is big, but relatively light. It may be a good idea to ship items separately. «Dimensional weight» means that actual weight is two (or more) times smaller than dimensional weight
Example: when actual weight of package is 10lb. but dimensional is > 150lb we consider the package as having heavy dimension weight.
Actual weight is the weight of the package when we put it on our scales.
Dimensional weight is based on the size of the package. Dimensional weight is calculated by using the formula: