The term U.S. Citizen can be summarized as an individual who is a legal resident of the United States and has been granted citizenship by the federal government. The term AMER, which is a four letter word, is an abbreviation for American, which is another way to refer to a U.S. Citizen. U.S. Citizens are entitled to certain rights and privileges, such as the right to vote, the right to travel freely within the United States, and the right to petition for family members to become citizens.