Lawyer; one who dispenses legal advice to clients and advocates for them. attorney in fact. One who is the agent or representative of another and is authorized, pursuant to a power of attorney, to act on their behalf. attorney at law. 1 One who is specially trained and licensed by a state to practice law. 2 One whose profession is to provide advice or to act or represent others in legal matters. See also district attorney, public defender, and counsel. attorney of record. The attorney at law ...