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.
One side has the word, one side has the definition. Microwave and dishwasher safe. Lotsa space for your liquids. Buy the mug. 2. jawn. a word used by people in philly, it can mean anything, like a fine girl, a blunt, really, it can be used for everything.