What is the meaning of take a rain check

what is the meaning of take a rain check

What is the meaning of “take a rain check”?

Answer:
The phrase “take a rain check” is an idiom that originated in baseball. When a baseball game was rained out, spectators were given a “rain check,” which allowed them to attend a future game instead. In modern usage, “take a rain check” means declining an offer or invitation with the hope or intention of accepting it at a later time. It indicates deferring an offer or invitation to a different time when one is more able or willing to accept.