Definition
The court process that validates a will (or applies state law without one), pays the estate's debts, and distributes what remains. It is public, can take months to over a year, and costs fees; assets with beneficiary designations or held in trusts and joint accounts skip it entirely.
Why it matters
Probate is why beneficiary forms on retirement accounts and life insurance beat instructions in a will: designated assets transfer in weeks while probated ones wait on a court. An outdated designation also overrides the will, a common and painful surprise.