Here is the definition of 'context' given in the CDI section of the JEE6 Tutorial:
Overview of CDI
"Contexts: The ability to bind the lifecycle and interactions of stateful components to well-defined but extensible lifecycle contexts"
This is a circular definition. What is a context. How is it different from a 'lifecycle context'? If it isn't different then it really is a circular definition which isn't really a definition. If they are different things, why do they have the same name?
This is probably a good definition for someone who who knows the subject; but not for someone who really needs the tutorial.