Here is the definition of a Foreclosure:

Foreclosure is the legal process in which a bank or other secured creditor sells or repossesses a parcel of real property (immovable property) after the owner has failed to comply with an agreement between the lender and borrower called a “mortgage” or “deed of trust”. Commonly, the violation of the mortgage is a default in payment of a promissory note, secured by a lien on the property. When the Foreclosure process is complete, the lender can sell the property and keep the proceeds to pay off its mortgage and any legal costs, and it is typically said that “the lender has foreclosed its mortgage or lien”.

Source:Wikipedia

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Hope this helps