Used to label an unusually large number of occurrances of a disease or condition in one place. An autism cluster would be an unusually large number of cases of autism in (perhaps) a single locality. Clusters constitute evidence in the search for causes of diseases and conditions.
Top definition. jawn. a word used by Philly cats to describe anything and everything. NY cats interject with the word joint but it doesn't convey the same feelings.
Definition of 'lantern jaw'. Word Frequency. lantern jaw. noun. ( when plural, refers to upper and lower jaw; when singular usually to lower jaw) a long hollow jaw that gives the face a drawn appearance.