stone deaf什么意思解释？

Mark Newsome was stone - deaf for the past twenty years.马克·纽瑟姆耳朵全聋了二十年.My grandpa is stone deaf.我的爷爷全聋了.The old man standing there is stone deaf.站在那儿的老人完全聋了....

stone deaf的音标：stone deaf的英式发音音标为：[stəun def]stone deaf的美式发音音标为：[ston dɛf]...