Definitions of smoke:

• noun:   the act of smoking tobacco or other substances

  Example: "He went outside for a smoke"

• noun:   something with no concrete substance

  Example: "His dreams all turned to smoke"

• noun:   an indication of some hidden activity

  Example: "With all that smoke there must be a fire somewhere"

• noun:   a cloud of fine particles suspended in a gas
• noun:   a hot vapor containing fine particles of carbon being produced by combustion

  Example: "The fire produced a tower of black smoke that could be seen for miles"

• noun:   tobacco leaves that have been made into a cylinder
• noun:   (baseball) a pitch thrown with maximum velocity

  Example: "He showed batters nothing but smoke"

• noun:   street names for marijuana
• verb:   inhale and exhale smoke from cigarettes, cigars, pipes

  Example: "We never smoked marijuana"

• verb:   emit a cloud of fine particles
• name:  A surname (very rare: popularity rank in the U.S.: #32815)