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Defensible Space: Public and semi-public space that is defensible in that it is surveyed, demarcated or maintained by somebody.

Density: Built density is normally expressed in terms of plot ratio for commercial development and number of units or habitable rooms per hectare for residential development.

Development Opportunities: Sites and areas within the City that afford the opportunity for new development. The sites or areas may either be vacant or contain underutilised buildings and properties.

Discount Food Store: Food store, generally with a gross retail floorspace of 1,000-2,000 m2, selling a limited but heavily price-discounted range of convenience products; the sector is dominated by the British concern Somerfield/Kwik Save and the Continental discounters Lidl, Aldi, Netto etc.

District Centre: Term formerly used to denote major centres serving different districts of the City, superseded in this Plan by the term town centre.

Dwelling House: Does not include a building containing one or more flats, or a flat contained within such a building. (Source: The Town and Country Planning (General Permitted Development)(Scotland) Order 1992).