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plunge

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verb British English pronunciation: plunge /plʌndʒ/ 
Word Forms
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present tense
I/you/we/theyplunge
he/she/itplunges
present participleplunging
past tenseplunged
past participleplunged
  1. 1
    [intransitive] to fall quickly from a high position

    It was still dark when the helicopter plunged 500 feet into the sea.

    His car had plunged off the mountain road in heavy rain.

    1. a.
      [transitive] to make someone or something fall quickly from a high position

      The wind suddenly shifted and they were both plunged off the cliff.

    2. b.
      [intransitive] to slope downwards suddenly

      Stone steps plunged down to the basement.

  2. 2
    [intransitive] if an amount or level plunges, it suddenly becomes much lower

    The temperature is expected to plunge below zero degrees overnight.

  3. 4
    [transitive] to suddenly put someone or something in a much less successful situation, or to be suddenly put in such a situation

    A string of recent defeats has plunged the team dangerously near the bottom of the table.

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