I was looking for this myself and found this on Smokefree.gov's site:
Smoking The act of drawing in or inhaling smoke of burning tobacco in a cigarette, pipe or cigar and exhaling it.
Here is a link to Smokefree.gov's dictionary: Smokefree.gov: Dictionary
Smoking The act of drawing in or inhaling smoke of burning tobacco in a cigarette, pipe or cigar and exhaling it.
Here is a link to Smokefree.gov's dictionary: Smokefree.gov: Dictionary