When referring to civil rights cases what does ';preempt'; mean?

I am trying to follow Fitzgerald v. Barnstable School but I keep tripping up when the word ';preempt'; is used. For example, ';...the issue of whether Title IX, the statute in the abstract, preempts an Equal Protection Clause claim...';When referring to civil rights cases what does ';preempt'; mean?
The word preempt means superseeds the equal protection law.~





The word preempt means to take the place of.~


To appropriate, seize, or take for oneself before others. See Synonyms at appropriate.





To take the place of; displace: A special news program preempted the scheduled shows.


To have precedence or predominance over: Discussion of the water shortage will preempt the other topics on this week's agenda.


To gain possession of by prior right or opportunity, especially to settle on (public land) so as to obtain the right to buy before others.