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.

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

plural of commonwealth

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

(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)

The formal and full name of the country Australia.

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.

(informal) The Commonwealth of Nations.

A member state of the Commonwealth of Nations (as most former British colonial possessions) which is a realm (kingdom) in personal union with the United Kingdom, i.e. has the British Sovereign as its 'shared' head of state, which is usually represented in its capital by a governor general.