From Longman Dictionary of Contemporary Englishbe rained off British English, be rained out American English phrasal verbDNif an event or activity is rained off or rained out, it has to stop because there is too much rain The match was rained off. → rain→ See Verb table
Examples from the Corpus
be rained off• Keith Rodwell, Ipswich Witches' commercial manager, shuts up shop after last night's match with Wolverhampton was rained off. 