overnight

• 形容发生在夜间或持续整夜的事物，也形容在极短时间内迅速取得成功或发生变化。

Describes something that happens or is done during the night, or something that becomes successful very quickly.

1. Lasting for one nightA2formal

   Occurring or continuing throughout the night.

   整夜的

   • We booked an overnight stay at the hotel.
   • The overnight train arrived early in the morning.
   • She packed an overnight bag for the trip.

   同义词all-nightnightlong

2. Sudden or immediateB1informal

   Happening very quickly or suddenly, as if in a single night.

   一夜之间

   • The singer became an overnight sensation after the concert.
   • His success was not overnight; he worked for years.
   • The company saw an overnight increase in sales after the ad.

   同义词abruptimmediateinstantaneousquickrapidsuddenswift

   反义词gradualprolongedslow

• 副词，表示“在夜间”或“整夜”。也用于比喻义，表示“突然”或“很快”，指在极短时间内发生的变化。

An adverb meaning "during the night" or "for the duration of the night." It is also used figuratively to mean "suddenly" or "very quickly," as in a change that happens in a very short period of time.

1. During the nightA2formal

   Throughout the entire night or for the duration of the night.

   在夜间

   • She stayed overnight at her friend's house.
   • The package will be delivered overnight.
   • They worked overnight to finish the project.

   同义词all-nightnightlong

2. Suddenly or quicklyB1informal

   Happening very quickly or suddenly, as if in a single night.

   一夜之间

   • He became famous overnight after his video went viral.
   • The company's success didn't happen overnight; it took years of hard work.
   • The situation changed overnight due to the new policy.

   同义词abruptlyall at onceimmediatelyinstantlyquicklysuddenly