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English definition of “plunge”

plunge

verb     /plʌndʒ/
plunge down/into, etc to fall or move down very quickly and with force: The car came off the road and plunged down the hillside. He plunged into the water.Falling and droppingMoving downwards
[I] to become lower in temperature, value, etc very suddenly and quickly: Temperatures plunged below zero.Becoming and making smaller or lessBecoming and making less strong
(Definition of plunge verb from the Cambridge Learner's Dictionary © Cambridge University Press)

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