examples of partitions
Partitions: divisions made by lines on the shield to form an even number of sections.
party 
Shield divided into two sections by a vertical line in the center.
quarterly 
Shield divided into two sections: on top, the left side of a per fess and on the bottom, the right side of a party.
per bend 
Shield divided into two sections by a diagonal line from the dexter chief to the sinister base.
per fess 
Shield divided into two sections by a horizontal line in the center.