Smoking is a recreational activity that involves the intentional burning of a small quantity of a substance, most often tobacco. It may take the form of:

Tobacco smoking

Cannabis smoking, a method to consume THC and other cannabinoids

Smoke, the airborne solid and liquid particulates and gases evolved when a material undergoes pyrolysis or combustion

Smoking (cooking), the process of flavoring, cooking, or preserving food by exposing it to the smoke from burning or smoldering plant materials

Pipe smoking, a method of smoking various substances with a pipe

Smoking jacket, a relatively rare piece of clothing

Smoking rolling papers, a brand of cigarette rolling papers

A pseudo-Anglicism for a dinner jacket or tuxedo