全ぜん面めん禁きん煙えん

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Meanings

1

noun

total smoking ban; completely non-smoking

Used especially on signage to indicate that smoking is prohibited in all areas of a facility or premises.

禁きん煙えん
禁煙 means 'no smoking' in general, while 全面禁煙 emphasizes that the ban applies to the entire area without exception.
分ぶん煙えん
分煙 refers to separating smoking and non-smoking areas, whereas 全面禁煙 prohibits smoking everywhere.

Compound of 全面 (all sides, entire surface) and 禁煙 (smoking prohibition).