What does it mean to say the US has a service economy?

Economies have several types of businesses, such as agricultural, manufacturing and service. Agricultural and manufacturing businesses are self-explanatory. Service business are ones that provided services like telephone, sales, medical and the like to the economy. A country's economy is called a service economy if its businesses are predominantly service oriented as opposed to agricultural or manufacturing oriented. The US has more businesses that provide services to the public than farming or manufacturing businesses, therefore it is a service economy.