Comon term: Greater city; Plural: Greater cities
Short definition: The greater city is an approximation of the urban centres when this stretches far beyond the administrative city boundaries.
Longer description: To better capture the entire urban centre, a ‘greater city’ level can be created. This is a fairly common approach and several greater cities already exist: Greater Manchester, Greater Nottingham etc. In most cases, the greater city contains a single city. Athens is a clear example of such an approach (see Figure below). The urban centre (in black) is much bigger than the city (in red). A greater city level was added (blue outline), which captures a far greater share of the population of the urban centre.