This page represents a single meaning or sense. A meaning can have a definition in multiple languages, some example usages, some context words to help the system identify the right meaning and most importantly several terms.
Sometimes you will have several terms that describe a certain meaning, some which are preferred and some which are deprecated.
Preferred terms are the best way to express this sense in new documents.
Deprecated terms are still understood but should be avoided in new documents.
The star system can be used to show which terms are preferred (5) and which are deprecated (no stars).