overcharge

from The American Heritage® Dictionary of the English Language, 5th Edition.

• intransitive verb To charge (a party) an excessive price for something.
• intransitive verb To fill too full; overload.
• intransitive verb To overstate or exaggerate.
• intransitive verb To charge too much.
• noun An excessive charge or price.
• noun A load or burden that is too full or heavy.

from The Century Dictionary.

• noun An excessive charge, load, or burden; the state of being overcharged.
• noun A charge, as of gunpowder or electricity, beyond what is necessary or sufficient.
• noun A charge of more than is just; a charge that is too high or exorbitant; an exaction.
• To charge or burden to excess; oppress; overburden.
• To put too great a charge in, as a gun.
• To surcharge; exaggerate: as, to overcharge a statement.
• To make an exorbitant charge against; demand an excessive price from.
• To make an extravagant charge or accusation against.

from the GNU version of the Collaborative International Dictionary of English.

• intransitive verb To make excessive charges.
• transitive verb To charge or load too heavily; to burden; to oppress; to cloy.
• transitive verb To fill too full; to crowd.
• transitive verb To charge (a buyer) an excessive price; to charge beyond a fair rate or price.
• transitive verb To exaggerate.
• transitive verb (Electricity) To charge (a battery) too much, so as to cause damage.
• transitive verb (Mil.) See Globe of compression, under Globe.
• noun An excessive load or burden.
• noun An excessive charge in an account.

from Wiktionary, Creative Commons Attribution/Share-Alike License.

• verb to charge more money than the correct amount or to surpass a certain limit while charging a bill
• verb to continue to charge an electric device beyond its electrical capacity
• noun An excessive load or burden.
• noun An excessive charge in an account.

from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.

• noun a price that is too high
• verb place too much a load on
• verb rip off; ask an unreasonable price