Definition of "Blackheath"

A suburban area of London, in the borough of Lewisham and borough of Greenwich, Greater London, England (OS grid ref TQ3976).  examples

A settlement and heath in Wonersh parish, Waverley district, Surrey, England (OS grid ref TQ0346).  examples

A town in Sandwell borough, West Midlands, England (OS grid ref SO9786).  examples

A town in the Blue Mountains, New South Wales, Australia.  examples

A suburb of Johannesburg, South Africa.  examples