The word
plenipotentiary (from the
Latin,
plenus +
potens, full + power) has two meanings. As a noun, it refers to a person who has "
full powers." In particular, the term commonly refers to a
diplomat fully authorized to represent a
government as a
prerogative (e.g.,
ambassador). As an adjective,
plenipotentiary refers to something—an edict, assignment, etc.—that confers "full powers."