"A lawful permanent resident (LPR), or 'green card' recipient, is defined in immigration law as a person who has been granted 'the status of having been lawfully accorded the privilege of residing permanently in the United States as an immigrant in accordance with the immigration laws, such status not having changed.' LPRs may live and work permanently anywhere in the United States, own property, and attend schools, colleges, and universities. They may also join the Armed Forces and apply to become U.S. citizens if they meet certain additional eligibility requirements. This Office of Immigration Statistics (OIS) 'Annual Flow Report' presents information obtained from applications for LPR status on the number and characteristics of persons who became LPRs in the United States during Fiscal Year 2017."
Department of Homeland Security: http://www.dhs.gov/