Meaning of “rain check” - Learner’s Dictionary

rain check

noun [ C ] uk us

a piece of paper that allows you to buy something at a low price although that thing is now being sold at a higher price


a ticket that allows you to see an event at a later time if bad weather stops that event from happening

take a rain check on sth

something you say when you cannot accept someone's invitation, but would like to do it at a later time:

I'm busy now, but can I take a rain check on that cup of coffee?

(Definition of “rain check” from the Cambridge Learner’s Dictionary © Cambridge University Press)