24/7 or 24‐7, 24×7, twen·ty-four sev·en [ twen-tee-fawr sev- uh n, ‐fohr‐, twuhn-tee‐] . Slang WORD ORIGIN adverb continually; constantly: They're together 24/7. adjective continual; constant: The manufacturer offers 24/7 customer support. Origin of 24/7
1985–90; shortening of
twenty-four hours a day, seven days a week
Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019
British Dictionary definitions for twenty-four-seven adverb informal twenty-four hours a day, seven days a week; constantly; all the time consultants would not be available 24/7
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition
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twenty-four-seven in Culture
Twenty-four hours a day, seven days a week: “This convenience store is open 24/7.” The term, which also appears as “24-7,” can be used figuratively to mean “with great time and effort”: “We worked on the design 24/7 in order to complete the work on time.” This
phrase was coined in the late twentieth century.
The New Dictionary of Cultural Literacy, Third Edition
Copyright © 2005 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.