As in, this may have a value or meaning or definition, but we haven't gotten there yet. A lot of sites may do this with a variable X, saying it hasn't yet been defined, or we haven't found the value yet, but we can make some statements. Undefined = not defined; we have not given an explanation for what this means.
In addition to everything that group members can do, a group admin can: Edit the group description, tags and settings. Add more admins to a group. Remove abusive posts and remove or block members. You're automatically an admin if you create a group.Otherwise, if you join a group that already has one or more admins, you can ask any of the existing admins to add you as an admin. If you're a member of a group with no admins, you can become an admin by clicking Make Me Admin under Members in the right column.More info. Get help for mobile apps and browsers.therwise, if you join a group that already has one or more admins, you can ask any of the existing admins to add you as an admin. If you're a member of a group with no admins, you can become an admin by clicking Make Me Admin under Members in the right column. More info. Get help for mobile apps and browsers.
Go to the group you want to be part of and then click Join Group in the top-right corner. You can also join any public group that you see on the About page of someone's profile by clicking Join. You may have to wait for a group admin to approve your request.