Flash cookie - Computer Definition
A data file that is stored in the user's computer by visiting a website that runs a Flash application. Officially called a "local shared object" (LSO), it functions like a regular browser cookie to personalize the user's experience, except that a Flash cookie can hold up to 100KB rather than only 4KB (see cookie). Clearing cookies in the Web browser does not clear Flash cookies. They must be cleared via Adobe Flash Player settings. See Evercookie.