Adaptive Errorindicates a cross-part projection failure.
Adaptive Warningindicates a minor problem with the adaptive relationship.
Analysis Invisibleindicates that the analysis visibility is off.
indicates a file linked as an AnyCAD reference file.
you are using Reference Import workflow. Either you are importing a non-Inventor files associatively (AnyCAD workflows) or you "open" an ipt or iam file last saved in a newer Inventor than the one you are using.
When it happens, the linked files cannot be edited. They are used as reference to the new file you are working on.
Activeindicates that the associated item is active. Examples include active analysis, active design view, and active positional representation.
Contact Setindicates component is included in the contact set.
Contact Set Errorindicates a serious problem with the contact set.
Contact Set Warning 
indicates a minor problem with the contact set.
Adaptiveindicates an adaptive part or feature.
Excludedindicates associated component has been set to exclude.
Healthyindicates no errors are present relative to the associated browser entry.
Unresolved Fileindicates that a file link is unresolved.
Update Requiredindicates associated entry in the browser is outdated.
Warningindicates a minor problem. Hover over the icon for additional information.
Errorindicates a serious problem. Hover over the icon for additional information.
Flexibleindicates a flexible assembly or sketch block.
Automatic Solveindicates a design accelerator component is in automatic update mode.
Positional Variation Sickindicates the positional variation is unable to resolve.
Manual Mode Updatedindicates a design accelerator component is in manual update mode and is up-to-date.