Hundred: 1) Anglo Saxon institution. Subdivision of a shire. Theoretically equals one hundred hides but hardly ever. Generally has their own court which meets monthly to handle civil and criminal law. In Danish is called a wapentakes (weapons taking?).
(MEDIEV-L. <a href="http://orb.rhodes.edu/schriber/Medieval_Terms.cfml">Medieval Terms</a>)
2) Subdivision of the shire based on groups of estates adding up to 100 hides: probably artifically imposed in Midlands 900-939, but in the south based on older units.
(Wood, Michael. Domesday: A Search for the Roots of England, 214)
3) An administrative sub-division of the shire, embracing several vills, and having a court to which men of the hundred owed suit at regular intervals.
(Warren, W.L. Henry II, 635)