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

be as cold as ice

to be extremely cold

Word of the Day

Let’s celebrate! (words and phrases for parties)

by Kate Woodford,
December 17, 2014
​​​ With Christmas and New Year almost upon us, we thought it a good time to look at the language of parties and celebrations. First, let’s start with the word ‘party’ itself. To have or throw a party or, less commonly, to give a party is to arrange a party: We’re having a

Read More 

cinderella surgery noun

December 15, 2014
cosmetic surgery to the feet We have all heard of people having nose jobs, boob jobs and liposuction – but now a new trend growing in popularity in America: Cinderella surgery.

Read More