Cambridge Dictionaries online Cambridge Dictionaries online

The most popular online dictionary and thesaurus for learners of English

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

rely on/upon sb/sth

verb uk phrasal verb with rely   /rɪˈlaɪ/ us  
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).
More examples
(Definition of rely on/upon sb/sth from the Cambridge Advanced Learners Dictionary & Thesaurus © Cambridge University Press)
What is the pronunciation of rely on/upon sb/sth?
Add Cambridge dictionaries to your browser to your website

Word of the Day

luck out

to be very lucky

Word of the Day

Think long and hard; the language of decisions

by Liz Walter,
January 28, 2015
One of the best ways (perhaps the best way) to improve your English is to learn how words go together in phrases, idioms, or other patterns such as verb/noun or adjective/noun pairs (often called ‘collocations’). This blog looks at some useful phrases and collocations connected with the subject of decisions, something we

Read More 

micro pig noun

January 26, 2015
an extremely small pig, bred to be a pet Micro pigs have become popular pets recently, with famous owners including Victoria Beckham, Paris Hilton and Olympic diver, Tom Daley.

Read More