alarm clock

noun

a clock with a bell or buzzer that can be set to sound at a particular time, as to awaken someone.

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Origin:
1690–1700

Dictionary.com Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2012.
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Link To alarm clock

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Alarm clock is always a great word to know.

So is flibbertigibbet. Does it mean:

a fool or simpleton; ninny.

a chattering or flighty, light-headed person.

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Collins

World English Dictionary

alarm clock

—n
	a clock with a mechanism that sounds at a set time: used esp for waking a person up

Collins English Dictionary - Complete & Unabridged 10th Edition
2009 © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins
Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009
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