proof.-official proof; especially, the proof before a competent officer or tribunal that an instrument offered, purporting to be the last will and testament of a person deceased, is indeed his lawful act; the copy of a will proved, under the seal of the court of probate, delivered to the executors with a certificate of its having been proved.-the right or jurisdiction of proving wills.-of or belonging to a probate, or court of probate; as, a probate record.-to obtain the official approval of, as of an instrument purporting to be the last will and testament; as, the executor has probated the will.