smoking
     adj : emitting smoke in great volume; "a smoking fireplace"
     n 1: the act of smoking tobacco or other substances; "he went
          outside for a smoke"; "smoking stinks" [syn: {smoke}]
     2: a hot vapor containing fine particles of carbon being
        produced by combustion; "the fire produced a tower of
        black smoke that could be seen for miles" [syn: {smoke}]
Source: WordNet® 2.0