Something that is barred prevents your entry. If you are trying to sneak into your friend's house, avoid the barred windows. To be barred is to be blocked from entrance or not allowed to do something — as if there were imaginary bars in your path.
What does barred mean legally?
Obstructed by a bar; subject to hindrance or obstruction by a bar or barrier which, if interposed, will prevent legal redress or recovery; as, when it is said that a claim or cause of action is “barred by the statute of limitations.” Knox County y.
What does it mean when a lawsuit is barred?
A person could have legal claims against a third party. However, the person looses his remedy to enforce such claims either due to statute of limitation, case-law or otherwise. When the remedy is lost, the claim is barred.