Not ordinary; exceptional; unusual. / Remarkably good. / Special or supernumerary.

Anything that goes beyond what is ordinary.

The property or state of being extraordinary.

plural of extraordinariness

plural of extraordinary

(US) The sending of untried criminal suspects to countries outside the USA for interrogation or imprisonment.

plural of extraordinary professor

In Germany, professor without chair, often in a side-area, or being subordinated to a professor with chair.

plural of extraordinary rendition

Outlandish and unbelievable claims must be followed by exceptional evidence to be considered acceptable in rational discourse.