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zero in on sth

phrasal verb with zero
 
/ˈzɪə.rəʊ/
 
US  /ˈzɪr.oʊ/ verb (present tense zeroes)

Definition

to direct all your attention towards a particular thing: We must decide on our target market, then zero in on it.Paying attention and being carefulCautious and vigilant
(Definition of zero in on sth from the Cambridge Advanced Learner's Dictionary & Thesaurus © Cambridge University Press)

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