Meaning of “overshadow” - Learner’s Dictionary

overshadow

verb [ T ] us uk /ˌəʊvəˈʃædəʊ/
SPOIL

to make something less enjoyable:

[ often passive ] The party was overshadowed by a family argument.
BE BETTER THAN

to make someone or something less important or successful

(Definition of “overshadow” from the Cambridge Learner’s Dictionary © Cambridge University Press)