You are usually advised by your orthodontist to wear your retainers all the time for the first 2-3 months following the completion of your active treatment. If this is the case, wear your retainers all day and all night wherever you are.
license fee - a fee paid to the government for the privilege of being licensed to do something (as selling liquor or practicing medicine) license tax, licensing fee. medical specialty, medicine - the branches of medical science that deal with nonsurgical techniques.
Also found in: Dictionary, Thesaurus, Wikipedia. An amount of money one must pay in order to acquire a license. For example, one may be required to pay $25 for a driver's license, even after one passes the driver's test. See also: Import license, Export license.