A person ordained to a lifetime ministry of service, word, sacrament and order. He or she is authorized to preach and teach God's word, to administer the sacraments of baptism and Holy Communion, and to order the life of the church for mission and ministry.
Source: Sharing God's Gifts Glossary of United Methodist Terms
Read about ordination in The United Methodist Church.
If you are sensing a call to ministry, you can learn much more about the process toward ordination from the General Board of Higher Education and Ministry.