noun: (historical) A local government district of Buckinghamshire, England, abolished on 31 March 2020.
noun: A town in Victoria, Australia.
noun: (uncommon) Short for Chiltern Hills. [A hilly region in southern England, extending from Oxfordshire through Buckinghamshire into Bedfordshire and Hertfordshire.]
noun: (historical) Short for Chiltern Hundreds. [(historical) An ancient administrative area in Buckinghamshire, England, composed of three hundreds and lying partially within the Chiltern Hills.]