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plummet

plum·met [ plúmmət ]


intransitive verb  (past and past participle plum·met·ed, present participle plum·met·ing, 3rd person present singular plum·mets)
Definition:
 
1. drop downward fast: to drop steeply and suddenly downward
plummeted into the ravine

2. suddenly decrease: to experience a sudden unexpected decrease in something such as value or price

3. suddenly become pessimistic: to decline suddenly, especially from a state of optimism to one of pessimism



noun  (plural plum·mets)
Definition:
 
1. sudden decrease: a sudden unexpected decrease in something such as value or price

2. construction 
Same as  plumb bob


[14th century. < Old French plomet "small lead ball" < Latin plumbum "lead"]
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