What is a "Pour-Over Will"?

A "Pour-Over Will" is used together with a revocable trust to “pour” any assets that were not in a decedent’s trust at the time of death over to the trust.

Example: My wife and I have formed revocable trusts as part of our estate plan, but we still need to sign Pour-Over Wills for things that aren’t held in our trust when we die.