n An addition of extra charge on the agreed or stated price.
n An excessive price charged e.g. to an unsuspecting customer.
n (philately) An overprint on a stamp that alters (usually raises) the original nominal value of the stamp; used especially in times of hyperinflation.
n (legal) A charge that has been omitted from an account as payment of a credit to the charged party.
n (legal) A penalty for failure to exercise common prudence and skill in the performance of a fiduciary's duties.