What is the meaning of Overcharge?

To charge (somebody) more money than the correct amount or to surpass a certain limit while charging a bill.

To continue to charge (an electrical device) beyond its capacity.

To charge (someone) with an inflated number or degree of legal charges (for example, charging them with a more serious crime than was committed); to upcharge.

To charge or load too heavily; to burden; to oppress.

To fill too full; to crowd.

To exaggerate.

An excessive load or burden.

An excessive charge in an account.

Any amount erroneously charged to a customer above the correct price for a product or service.

Source: wiktionary.org