Frequently asked questions concerning definitions 

How do I see if a definition is shared?
The icon then includes a hand instead of the usual icon for a graph.

How can I see who has access to my definitions?
In the preview for definitions in the menu, you can click on the "share" button. Then a list of users appears who can see the definitions.

Can others change my shared definitions?
Yes, everyone with access to a definition can change it.