- WHS - World Heritage Site
- WILL - Wireless Local Loop
- Waste - The unwanted by-product of industrial, commercial and domestic activities or anything otherwise discarded.
- Waste Disposal - The process of getting rid of unwanted, broken, worn out, contaminated or spoiled materials in an orderly, regulated fashion.
- Waste Management Hierarchy - Is at the centre of European waste management policy. The hierarchy indicates the relative priority of different methods of managing waste, and provides instruction to waste management policy and planning initiatives on how to progress towards sustainable waste management policies.
- Waste Management Strategy - Published on 20th March 2000, this document’s main purpose is to provide a framework for the development of regional wastemanagement facilities in Northern Ireland.
- Waste Management Plans (WMPs) - The principle mechanism for implementation of the Waste Management Strategy that requires District Councils to prepare WMPs in line with the timetable contained within the Strategy. Article 23 of the Waste & Contaminated Land Order 1997 imposed a duty on District Councils to prepare WMPs detailing what arrangements were appropriate for dealing with the recovery, treatment and disposal of controlled waste arising in their districts.
- Waste Management Licence (WML) - A licence granted by the Environment & Heritage Service under the Waste & Contaminated Land Order (Northern Ireland) 1997. The WML will replace the current Waste Disposal Licence (WDL) granted by the relevant District Council under the Pollution Control and Local Government (Northern Ireland) Order 1978 when licensing powers transfer to EHS.
- Watercourse - A river, stream, canal, ditch, drain, cut, culvert, dyke,sluice, valve, overland carrier, millrace or layde. Water mains and sewers are not included in this definition.
- Whiteland - This term refers to undeveloped land that was previously included within a development limit but was not zoned for a specific use. Whiteland sites may be able to accommodate a range of different landuses or there may be specific difficulties associated with development, for example providing a safe means of access, an adequate means of sewage disposal or sites that are effected by flooding.