expert witness expertship • expiable · · · Info · Definitions · Antonyms · Characters · · expert witness · · Text Common · · Latin · · Scripts 14 · · Length 4 · · Syllables Definitions · · · (noun) a witness who has knowledge not normally possessed by the average person concerning the topic that he is to testify about. Synonyms: expert witness. · · Noun Definition 1 Antonyms · · · lay witness · · Antonym 0 Characters · · space U+0020 e latin small letter e U+0065 i latin small letter i U+0069 n latin small letter n U+006E p latin small letter p U+0070 r latin small letter r U+0072 s latin small letter s U+0073 t latin small letter t U+0074 w latin small letter w U+0077 x latin small letter x U+0078