
1) County
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https://www.crosswordclues.com/clue/northumberland

Northumberland (pronounced d, d) is the northernmost ceremonial county and a unitary authority area in North East England. It borders Cumbria to the west, County Durham to the south and Tyne and Wear to the southeast and the Scottish Borders council area to the north. Its North Sea coastline is a designated Area of Outstanding Natural Beauty with ...
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http://en.wikipedia.org/wiki/Northumberland
[Ontario electoral district] Northumberland was a federal and provincial electoral district in Ontario, Canada, that was represented in the Canadian House of Commons from 1917 to 1968 and from 1987 to 2003, ad in the Legislative Assembly of Ontario from 1999 to 2007. This riding was first created in 1914 from Northumberland East and Northum...
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http://en.wikipedia.org/wiki/Northumberland_(Ontario_electoral_district)

administrative and historic county of northeastern England. It is England`s northernmost county, bounded to the north by Scotland, to the east by the ...
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http://www.britannica.com/eb/a-z/n/56

county, central Pennsylvania, U.S., consisting of a mountainous region in the Appalachian Ridge and Valley physiographic province bounded to the west ...
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http://www.britannica.com/eb/a-z/n/56

In medieval times and later the county covering most of England from the Tyne north to the Scottish Border. However, in the 1970s much of Newcastle was removed from the county and is administered separately. The county town of Northumberland is now Morpeth.
Found on
http://www.encyclo.co.uk/local/20766

An excellent place for fishing in the north east
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http://www.encyclo.co.uk/visitor-contributions.php

Northumberland is a British, modern, farmhouse, natural rind hard cheese made from un-pasteurised cow's milk in Northumberland.
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http://www.probertencyclopaedia.com/browse/QN.HTM

HMS Northumberland is a British Type 23 Duke Class frigate of 3500 tons displacement. HMS Northumberland is powered by two Rolls-Royce Spey SM1C gas turbines and four Paxman Valenta 12 RPA 200 CZ diesel engines providing a top speed of 28 knots on gas power and a range of 7800 miles at 15 knots. She carries a crew of 169 and has accommodation for 1...
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http://www.probertencyclopaedia.com/browse/RN.HTM

[
n] - the northernmost county of England
Found on
http://www.webdictionary.co.uk/definition.php?query=Northumberland
noun the northernmost county of England; has many Roman remains (including Hadrian`s Wall)
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https://www.encyclo.co.uk/local/20974
Click images to enlargeCounty of northern England. Area 5,030 sq km/1,942 sq mi Towns and cities Morpeth (administrative headquarters), Berwick-upon-Tweed, Hexham Physical Cheviot Hills; rivers Aln, Coquet, Rede, Till, Tweed, upper Tyne; Northumberland National Park in the west Features Holy Island (Li...
Found on
https://www.encyclo.co.uk/local/21221

a county in NE England. 286,700; 1943 sq. mi. (5030 sq. km).
Found on
https://www.infoplease.com/dictionary/northumberland
No exact match found.