n A professional person qualified (as by a law degree and/or bar exam) and authorized to practice law, i.e. conduct lawsuits and/or give legal advice.
v (colloquial|criminal law) With "up", to exercise the right to ask for the presence of one's attorney.
v To barrage with questions in order to get the person to admit something, usually used in the past tense "[You've been] lawyered."