If you own anything, a car, a home, a bank account or other financial assets, a collection of books, cd's, electronic equipment, etc., then -- congratulations! You have an 'estate!'
The very word 'estate' conjures up images of mansions, limos, etc. In reality, most people have an estate -- be it large or small. Your 'Estate' is just the stuff you own when you die! While you are alive, you sell your stuff at a yard sale. When you die, the same stuff is sold at an Estate sale!