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.
jawn. 1  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. 2  a word used by people in philly, it can mean anything, like a fine girl, a blunt, really, it can be used for everything. it basically means thing.
Also found in: Dictionary, Thesaurus, Acronyms, Idioms, Encyclopedia, Wikipedia. Related to wonk: Jawn. Informal and somewhat derogatory; a new hire at a Wall Street trading firm. The term was popularized by the book Liar's Poker, which describes the author's experience as a bond trader on Wall Street in the 1980s.