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 aday , seven days aweek ;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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alexz commented on the word 24-7
I first heard this in the mid nineties. This book 24/7 is from 1994
http://goo.gl/lcNQo
January 9, 2013