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Longman Dictionary of Contemporary English
non-smoking
adjective
COLLOCATIONS FROM OTHER ENTRIES
a no-smoking/non-smoking area
▪ The airport terminal is a no-smoking area.
EXAMPLES FROM OTHER ENTRIES
▪ I asked for a seat in the non-smoking section of the plane.
EXAMPLES FROM CORPUS
▪ Combining smoking and non-smoking men taking atenolol gave a risk ratio of 1.01.
▪ Given popular perceptions of the paparazzi, Young is surprisingly clean-living: a non-drinking, non-smoking, fitness fanatic.
▪ His entertainment featured abundant wine and cigars, though he himself was a non-smoking teetotaller.
▪ Somewhere south of York, Hubert was alone in a second-class non-smoking compartment.
▪ They sit together in a non-smoking section.
Wiktionary
non-smoking

a. 1 Having restrictions on smoking. 2 Using no tobacco products. alt. 1 Having restrictions on smoking. 2 Using no tobacco products.

Usage examples of "non-smoking".

They boarded and took seats in an empty non-smoking car which smelled faintly of urine and old vomit.

He had seated himself by the window in a first-class non-smoking compartment, with his back to the engine because unfortunately another fellow was already in the other place, and jamming his trilby down on his head he sat with his fists deep in scarlet--lined gabardine and panicked.

Still farther along the corridor, in a first-class non-smoking compartment, Aline Peters looked through the window and thought of many things.

The yellow-fronted diesel snaked its slow way punctually through the points just north of the station, and two minutes later he was seated opposite a young couple in a non-smoking compartment.