연소를 하거나 사용할 때 연기가 거의 또는 전혀 발생하지 않는.
Producing or emitting little or no smoke during combustion or use.
예문:
"The city council encourages residents to use smokeless fuel to improve air quality."
"Modern smokeless fire pits allow you to enjoy a campfire without the irritation of thick smoke."
"The company launched a new line of smokeless tobacco products for adult consumers."