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English definition of “run across sb”

run across sb

informal
verb uk phrasal verb with run   /rʌn/ (present participle running, past tense ran, past participle run) us  
to meet someone you know when you are not expecting to: I ran across several old friends when I went back to my hometown.
(Definition of run across sb from the Cambridge Advanced Learners Dictionary & Thesaurus © Cambridge University Press)
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