What is the meaning of surcharge?

noun

• An additional charge (as for items previously omitted or as a penalty for failure to exercise common caution or common skill. )

verb

• Charge an extra fee, as for a special service.
• Rip off; ask an unreasonable price.
  • synonyms: overcharge, soak, gazump, fleece, plume, pluck, rob, hook
• Fill to capacity with people.
  • usage: "The air raids had surcharged the emergency wards"
• Print a new denomination on a stamp or a banknote.
• Fill to an excessive degree.
  • usage: "The air was surcharged with tension"
• Place too much a load on.
  • usage: "don't overload the car"
  • synonyms: overload, overcharge
• Show an omission in (an account) for which credit ought to have been given. .