Indian summer
- noun
- /ˈɪndiən ˈsʌmər/
Examples
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I would want to call it Indian Summer, since it is the change from summer to fall that I love so much.
Blog text (27) -
After a brief downturn in sales, the company experienced an unexpected Indian summer as their new product became popular among consumers.
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Following the initial decline in viewer ratings, the television show enjoyed an Indian summer thanks to its compelling new storyline.
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The artist's career had entered a lull, but her latest exhibition marked an Indian summer of renewed interest and success.
How Successful
Surface Forms
Morphology
The meaning — a late period of renewed success or an unseasonably warm spell after decline — cannot be derived from 'Indian' (pertaining to India) + 'summer' (the warm season). A B1 learner who knows the constituents would likely take it literally (a summer related to India) and not infer the temporal/figurative sense; the idiom is culturally specific and unpredictable.
Etymology
Indian summer uses the picture of that late, unexpected warm spell at the end of the year; like a bright little return of warmth after things had begun to cool down. So, it also means 'a late period of renewed success or activity'.