power of attorney - a legal instrument authorizing someone to act as the grantor's agentstock power - a power of attorney document to transfer ownership of a registered security from the owner to another party proxy - a power of attorney document given by shareholders of a corporation authorizing a specific vote on their behalf at a corporate meeting jurisprudence, law - the collection of rules imposed by authority; "civilization presupposes respect for the law"; "the great problem for jurisprudence to allow freedom while enforcing order" |