It could be databases on an instance, indexes on a table, columns in a table, etc. etc. And in case you were wondering, you can get the answers here.
You see this come up every once in a while. A forum question, a question on #sqlhelp, even in *shudder* your own systems. And the answer always comes back the same: Limits are not goals! Usually accompanied by a few jokes.
For more on this, Michael Swart coined Swart’s Ten Percent Rule.