rely on/upon sb/sth definition, meaning - what is rely on/upon sb/sth in the British English Dictionary & Thesaurus - Cambridge Dictionaries Online

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English definition of “rely on/upon sb/sth”

rely on/upon sb/sth

phrasal verb with rely uk   us   /rɪˈlaɪ/ verb
B2 to need a particular thing or the help and support of someone or something in order to continue, to work correctly, or to succeed: [+ -ing verb] The success of this project relies on everyone making an effort. I rely on you for good advice. [+ to infinitive] I'm relying on the garage to fix the car by tomorrow.B2 to trust someone or something or to expect him, her, or it to behave in a particular way: British weather can never be relied on - it's always changing. [+ -ing verb] Don't rely on finding me here when you get back (= I might have gone).
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(Definition of rely on/upon sb/sth from the Cambridge Advanced Learners Dictionary & Thesaurus © Cambridge University Press)
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