Definition
一天天 is a reduplicated time expression meaning 'day after day' or 'day by day'. It emphasizes gradual, cumulative change over a period of days, often used adverbially before a verb (e.g., 一天天在变化 'changing day by day'). Although its dictionary POS is marked as noun, it functions primarily as an adverb in real usage, describing progression. The pattern is similar to other reduplicated time words like 一年年 ('year after year').
n.
day after dayday by daygradually over the course of days
Examples
- 一天天。Wǒmen de chéngshì zhèngzài yī tiān tiān de biànhuà.Our city is changing day by day.
- 一天天。Háizi de Hànyǔ shuǐpíng yī tiān tiān tígāo le.The child's Chinese level is improving day after day.
- 一天天，。Tiānqì yī tiān tiān biàn nuǎn, chūntiān kuài dào le.The weather is getting warmer day by day; spring is almost here.
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