Definition of “zero in on sth/sb” - English Dictionary

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“zero in on sth/sb” in British English

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zero in on sth/sb

phrasal verb with zero uk /ˈzɪə.rəʊ/ us /ˈzɪr.oʊ/ verb present tense zeroes

to aim a weapon directly at something or someone:

Modern military aircraft use computers to help them zero in on their targets.

(Definition of “zero in on sth/sb” from the Cambridge Advanced Learner's Dictionary & Thesaurus © Cambridge University Press)