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Definition of Doppler shift noun from the Oxford Advanced Learner's Dictionary

Doppler shift

noun
 
/ˈdɒplə ʃɪft/
 
/ˈdɑːplər ʃɪft/
(physics)
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  1. the change in pitch (of sound), colour (of light), etc. caused by the Doppler effect
See Doppler shift in the Oxford Advanced American Dictionary
pity
noun
 
 
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