rain check
noun
plural
rain checks
plural
rain checks
Britannica Dictionary definition of RAIN CHECK
[count]
US
1
:
a ticket given to people so that they can go to another event (such as a baseball game) if the one they were watching or planning to go to is canceled or stopped because of rain
2
:
a promise to allow someone to buy or do something in the future because it is not possible to buy or do it now
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The store offered rain checks when the sale items had all sold.
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She asked if she could have/take a rain check on the invitation for dinner. [=she said she wasn't able to come to dinner and asked if she could be invited again at a future time]
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“Would you like to go to lunch with me?” “I'm afraid I can't today. Can I take a rain check?” [=can I go to lunch with you another day?]