eyewitnessPronunciation: /ˈʌɪwɪtnɪs/Translate eyewitness | into French | into German | into Italian | into Spanish Definition of eyewitness noun a person who has seen something happen and can give a first-hand description of it: [as modifier]:eyewitness accounts of the London blitzeyewitness in other Oxford dictionaries Definition of eyewitness in the US English dictionary