to light something and make it brighter:
The streets were illuminated with strings of coloured lights.
to explain and show more clearly something that is difficult to understand:
an article which illuminates the issues at stake
to light something and make it brighter:
The streets were illuminated with strings of coloured lights.
to explain and show more clearly something that is difficult to understand:
an article which illuminates the issues at stake
to put light in or on something:
The buildings were illuminated at night.
If you illuminate a subject, you explain it:
This article illuminates the basic principles of economics.