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English definition of “zero in on sth”

zero in on sth

verb uk phrasal verb with zero   /ˈzɪə.rəʊ/ us    /ˈzɪr.oʊ/ (present tense zeroes)
to direct all your attention towards a particular thing: We must decide on our target market, then zero in on it.
(Definition of zero in on sth from the Cambridge Advanced Learners Dictionary & Thesaurus © Cambridge University Press)
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