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.
Utinni!. âA commonly used Jawa cry â Listen (file info). Jawas were easily identifiable by their traditional brown hooded robes, though it was not unheard of for them to wear other colors. Other notable features included their glowing yellow eyes, small stature and high pitched, quickly spoken language called Jawaese.