"official proving of a will," c. 1400, from Latin probatum "a thing proved," neuter of probatus "tried, tested, proved," past participle of probare "to try, test, prove" (see prove).
1560s, "to prove," from probate (n.) or from Latin probatus, past participle of probare "to make good; esteem, represent as good; make credible, show, demonstrate; test, inspect; judge by trial." Specific sense of "prove the genuineness of a will" is from 1792. Related: Probated; probating.
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