0 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.
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).
Can we confidently rely on him to get the job done?
The school has to rely on the goodwill of the parents to help it raise money.
One of the good things about Inga is that you can always rely on her unfailing enthusiasm.