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plunge

noun [C] (REDUCTION)
 
 
/plʌndʒ/

Definition

a sudden and large fall in value or level: We are expecting a plunge in profits this year.Falling and droppingMoving downwardsBecoming and making smaller or lessBecoming and making less strong
(Definition of plunge noun (REDUCTION) from the Cambridge Advanced Learner's Dictionary & Thesaurus © Cambridge University Press)
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