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.
JAWA is a motorcycle manufacturer founded in Prague, Czechoslovakia in 1929 by FrantiÅ¡ek JaneÄek, who bought the motorcycle division of Wanderer.The name JAWA was established by concatenating the first letters of Ja neÄek and Wa nderer.In the past, especially in the 1950s, JAWA was one of the top motorcycle manufacturers and exported its 350 (Perak) pÃ©rÃ¡k into over 120. countriesn the past, especially in the 1950s, JAWA was one of the top motorcycle manufacturers and exported its 350 (Perak) pÃ©rÃ¡k into over 120. Countries another famous model in the 1970s was the 350. Californian it appeared in the typical black and red coloring From californian beaches To New. zealand