foreclosure
When a bank takes back a home for unpaid loan bills.
Foreclosure is what happens when someone who borrowed money to buy a house can't make their monthly payments anymore, and the bank takes the house back. When you buy a house with borrowed money (called a mortgage), the bank has a legal claim on the house until you finish paying them back over many years. If you stop making those payments, the bank can force you to move out and then sell the house to get their money back. That process is called foreclosure.
Imagine saving up to buy something expensive on a payment plan, but the store keeps ownership until you finish paying. If you can't make the payments, they take it back. Foreclosure works similarly, except it involves someone's home.
Foreclosure is serious because losing your home affects everything: where you live, which school you attend, and where your family goes each day. People usually face foreclosure during hard times, like when someone loses their job or faces big medical bills. Banks often try to work out a new payment plan before foreclosing, since the whole process costs them money too and can leave a family without a home.
You might hear news reports mention foreclosure rates rising during economic downturns, when many families struggle financially at the same time.