/plen'euh peuh ten"shee er'ee, -sheuh ree/ , n. , pl. plenipotentiaries , adj.
n.
1. a person, esp. a diplomatic agent, invested with full power or authority to transact business on behalf of another.
adj.
2. invested with full power or authority, as a diplomatic agent.
3. conferring or bestowing full power, as a commission.
4. absolute or full, as power.
[ 1635-45; plenipotentiarius. See PLENIPOTENT, -I-, -ARY ]