It'd be really nice if articles like this began with a definition of the term. Terms can often be ambiguous so this helps ground the article and ensure everyone is talking about the same thing. There are also plenty of HN readers who have no idea what it refers to that would also benefit greatly.
http://continentaltire.custhelp.com/app/answers/detail/a_id/...
robotresearcher linked to an investment-related definition in another comment:
https://corporatefinanceinstitute.com/resources/knowledge/fi...