To take a rain check is an informal expression which means you can not accept an invitation but you intend to do so at a later date.
For example, last week I was invited out for dinner but because I was working I asked if I could take a rain check.
English for adults : Exam Guides for students: Lesson Plans for teachers
To take a rain check is an informal expression which means you can not accept an invitation but you intend to do so at a later date.
For example, last week I was invited out for dinner but because I was working I asked if I could take a rain check.