English Reference
adverb · adjective · verb · noun

overnight

adv. · adj. · v. · n.
US /ˈoʊvɝˈnaɪt/ overnight

  1. 01 B1 Intermediate

    adv.happening during the night or until the next morning.

    adv.occurring throughout the course of a single night.

    Simple

    We decided to travel overnight to avoid the heavy daytime traffic.

    In context

    The snow fell steadily overnight, leaving the entire valley blanketed in a thick layer of white by dawn.

    Usage

    Usually placed after the verb or at the end of the clause.

  2. 02 B1 Intermediate

    adv.happening very quickly or suddenly.

    adv.occurring with extreme rapidity or suddenness, often metaphorically.

    Simple

    The young singer became a star overnight after her video went viral.

    In context

    The sleepy fishing village was transformed overnight into a bustling tourist hub following the completion of the new coastal highway.

  3. 03 B1 Intermediate

    adj.lasting for or used during one night.

    adj.intended for use during a night or lasting for the duration of a night.

    Simple

    I packed a small overnight bag for my trip to the city.

    In context

    The hospital offers overnight stays for patients who require observation after minor surgical procedures.

    one night
  4. 04 B2 Upper Intermediate Informal

    v.to stay somewhere for the night.

    v.to spend the night at a particular location; intransitive use.

    Simple

    We can overnight at my cousin's house if the weather gets too bad to drive.

    In context

    The hikers decided to overnight in a small mountain hut rather than risk a descent in the fading light.

  5. 05 B2 Upper Intermediate American English

    v.to send a letter or package so it arrives the next day.

    v.to dispatch a parcel or document via a courier service for next-day delivery.

    Simple

    I need to overnight these documents to the head office so they arrive by tomorrow.

    In context

    The legal team had to overnight the signed contracts to ensure the merger was finalised before the weekend deadline.

    Usage

    Transitive verb taking a direct object.

  6. 06 C1 Advanced Technical Television

    n.the number of people who watched a TV show, reported the next morning.

    n.preliminary viewership figures for a television programme, typically released the morning following the broadcast.

    Simple

    The show's overnights were much higher than the producers expected.

    In context

    Despite a strong marketing campaign, the overnights suggested that the new sitcom failed to capture the target demographic.

    Usage

    Almost always used in the plural form.

Thousands more people were stuck overnight at the Narita airport serving the Tokyo region, with trains out of the area stopped.

Al Jazeera· 14 Aug 2026

Some of the women were reported to have stayed overnight, raising security concerns.

BBC News· 13 Aug 2026

Inherited from Middle English overnyght, from Old English ofer niht (“through the night, overnight”), equivalent to over + night. Verbal use (late 19th c.) may have been influenced by German übernachten (16th c.), though it could also have developed independently. Compare also Dutch overnachten (“to overnight”), Middle Low German ȫvernachten (“to overnight”), West Frisian oernachtsje (“to overnight”), Saterland Frisian uurnoachtje (“to overnight”).

Etymology adapted from Wiktionary, available under CC BY-SA 4.0.

This entry
Origin German übernachten
Level B2 · Upper Intermediate
Frequency Common
Updated