"Free Software Definition" says that that a piece of software can be classified as free if it meets The Four Freedoms. The first of these is:
The freedom to run the program as you wish, for any purpose (freedom 0).
While most of the real licences classified as free software licences contain some limitations, f.e. the MIT licence requires this:
...The above copyright notice and this permission notice shall be included in all copies or substantial portions of the Software....
What if we wrote a piece of software that breaks this licence? For example, we could write a spamming app that distributes itself without including the copyright notice. This would break the licence. So the MIT Licence, and any other licence that provides some bounds and limitations can be disclassified as free software licence by breaking the freedom 0, thus not allowing the program to be run in order to break those bounds.