MethuselahPronunciation: /mɪˈθ(j)uːz(ə)lə/Definition of Methuselah (in the Bible) a patriarch, the grandfather of Noah, who is said to have lived for 969 years (Gen. 5:27). used to refer to a very old person:I’m feeling older than MethuselahMethuselah in other Oxford dictionaries Definition of Methuselah in the US English dictionary