doppler effect Doppler • dopplerite · · · Info · Definitions · Characters · · doppler effect · · Text Common · · Latin · · Scripts 14 · · Length 4 · · Syllables Definitions · · · (noun) change in the apparent frequency of a wave as observer and source move toward or away from each other. Synonyms: Doppler effect, Doppler shift. · · Noun Definition 1 Characters · · space U+0020 c latin small letter c U+0063 d latin small letter d U+0064 e latin small letter e U+0065 f latin small letter f U+0066 l latin small letter l U+006C o latin small letter o U+006F p latin small letter p U+0070 r latin small letter r U+0072 t latin small letter t U+0074