Definitions

from The American Heritage® Dictionary of the English Language, 5th Edition.

  • adverb Continuously; unceasingly.

from Wiktionary, Creative Commons Attribution/Share-Alike License.

  • adverb Twenty-four hours a day, seven days a week; continuously.

Etymologies

from The American Heritage® Dictionary of the English Language, 4th Edition

[Short for 24 hours a day, 7 days a week.]

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Examples

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Comments

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  • I first heard this in the mid nineties. This book 24/7 is from 1994

    http://goo.gl/lcNQo

    January 9, 2013