(politics) The condition or policy of operating as a commonwealth.

(obsolete) The well-being of a community. / The entirety of a (secular) society, a polity, a state. / Republic. Often capitalized, as Commonwealth.

The Commonwealth of Nations, a loose confederation of nations based around the former British Empire. / (Britain) The Commonwealth of England, which existed from 1649 to 1660, under Cromwell.

plural of commonwealth

The formal and full name of the country Australia.

(uncommon) The generalised variety of English spoken and written primarily in the United Kingdom and its former colonies, frequently excluding Canada; always excluding the United States of America. (ie. non-North American English)

(informal) The Commonwealth of Nations.

A sporting event, somewhat like the Olympic Games, held every four years and involving athletes from the Commonwealth of Nations.

An association of independent, sovereign states most of which formerly constituted the British Empire.

(UK, dated) Recently decolonized countries, especially non-white developing countries.