This week's book giveaway is in the OCAJP 8 forum. We're giving away four copies of OCA Java SE 8 Programmer I Study Guide and have Edward Finegan & Robert Liguori on-line! See this thread for details.
Well I can tell you it is not a standard scope. Either it is custom to your application or to some other 3rd party library you are using. You can search for CustomScopeConfigurer in your context xml files to see if you can find it being registered anywhere and then take a look at the implementation to figure out what it does. If you don't find it there you can look for all implemenations of the Scope interface in your workspace and try to figure out what library it is coming out of.