1.Definition: (of an official) serving an unusual or special function in addition to those of the regular officials
"An ambassador extraordinary"
2.Definition: beyond what is ordinary or usual; highly unusual or exceptional or remarkable
"Extraordinary authority", "An extraordinary achievement", "Her extraordinary beauty", "Enjoyed extraordinary popularity", "An extraordinary capacity for work", "An extraordinary session of the legislature"
3.Definition: far more than usual or expected
"An extraordinary desire for approval"