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no-smoking

[noh-smoh-king]
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adjective
  1. nonsmoking.
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Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018

Word Origin and History for no-smoking

adj.

1905; the sign wording itself is attested by 1817.

Smoking is a vice to [sic] -- and a national one, of such magnitude that railroad corporations throughout all their routes in the United States, have a special command in large letters, conspicuously placed at depots and inside of the cars -- "No smoking allowed here." ["The Sailor's Magazine," December 1840]
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Online Etymology Dictionary, © 2010 Douglas Harper