Look up: Motte-and-bailey

1. Motte and Bailey
   The first castles built by the Normans often consisted of a simple motte with a tower built on it. A motte is a large earth mound. This mound would often be surrounded by a larger outer, enclosure, known as a bailey. This might contain storerooms, stables and houses. Although castles continued to be...
   Found on http://www.keystothepast.info/durhamcc/k
   
   
2. motte-and-bailey
   A defensive system consisting of a mound of earth (the motte) with a wooden tower on top, placed within a courtyard (the bailey, also called the ward).
   Found on http://www.pitt.edu/~medart/menuglossary
   
   
3. Motte-and-Bailey
   earth-mound with wood or stone keep and an adjoining courtyard with a ditch and palisade
   Found on http://www.castlexplorer.co.uk/glossary.
   
   
4. Motte-and-bailey
   A `motte-and-bailey` is a form of castle, with a wooden or stone keep situated on a raised earthwork called a motte, accompanied by an enclosed courtyard, or bailey, surrounded by a protective ditch and palisade. Relatively easy to build with unskilled, often forced labour, but still militarily form...
   Found on http://en.wikipedia.org/wiki/Motte-and-b