Search Result for "rain check":
Wordnet 3.0

NOUN (2)

1. a promise that an unaccepted offer will be renewed in the future;

2. a ticket stub entitling the holder to admission to a future event if the scheduled event was cancelled due to rain; 



WordNet (r) 3.0 (2006):

rain check
    n 1: a promise that an unaccepted offer will be renewed in the
         future
    2: a ticket stub entitling the holder to admission to a future
       event if the scheduled event was cancelled due to rain