a future time of need, esp financial
WordReference Random House Unabridged Dictionary of American English © 2026
rain′y day′,
rain′y-day′, adj.
- a time of need or emergency:saving money for a rainy day.
- 1570–80
Collins Concise English Dictionary © HarperCollins Publishers::
'rainy day' also found in these entries (note: many are not synonyms or translations):