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.
sharpen verb [T] (MAKE SHARP). âº to make something âsharp or âsharper: We just had these âknives/âscissors sharpened. He sharpened his âpencil (= made the end used for writing come to a âpoint). (Definition of sharpen from the Cambridge Academic Content Dictionary Â© Cambridge University Press).