The term PROOF OF A WILL is related to the legal process of probate, which is the process of proving the validity of a will in court. Probate is a seven-letter word and is the legal process of validating a will and distributing the deceased's assets according to the terms of the will. The process of probate involves verifying the authenticity of the will, determining the validity of any claims against the estate, and ensuring that all debts and taxes are paid before the remaining assets are distributed to the beneficiaries.