Answer:
When a country that is not the United States uses the U.S. dollar as its currency.
Step-by-step explanation:
A country is said to "dollarize" when such a country allows the use of the dollar alongside or instead of its currency.
A country may dollarize in order to increase ease of doing businesses or as a means of facilitating tourism and boosting the country's tourism potential.
Dollarization may be official and have the approval of the leadership of a country. This occurs when a country ceases to use her domestic currency and begins to use only foreign currency.