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.
Laun definition. A nickname when it comes to name Lauren. A Harry Potter addict who wants to bake cupcakes. An incredible individual be around. by Ling Laidlaw Report definition.