Oxford Dictionary English power of attorney nounnoun BrE BrE//ˌpaʊər əv əˈtɜːni// ; NAmE NAmE//ˌpaʊər əv əˈtɜːrni// [uncountable, countable] (pl. powers of attorney) (law) Add to my wordlistjump to other resultsthe right to act as the representative of somebody in business or financial matters; a document that gives somebody this rightSee power of attorney in the Oxford Advanced American DictionaryCheck pronunciation: power of attorney oxfordlearnersdictionaries.com