The term "substantial compensation" refers to a significant amount of money or other benefits that is given as reparation for some loss, injury or damage suffered. It typically implies an amount that is more than just enough to cover expenses and make up for any inconvenience caused; it's meant to be sufficient to address the harm done in a meaningful way. The exact definition of what constitutes "substantial" may vary depending on the context, but generally speaking, it would imply an amount that is significant or generous enough to be considered fair and just compensation for the loss or damage suffered.