1.NounA device with a heating element, used to vaporize a liquid.
"Vaporizers are used in electronic cigarettes to simulate smoke.; Their Fordson was equipped with a vaporizer."
2.NounSuch a device to facilitate vaping.
"Vaporizers are used in electronic cigarettes to simulate smoke."
3.NounA medical device for administering medicine via inhalation. The produced vapor condensates into fine aerosols, forming a mist inside the device, to be inhaled by the patient for delivery of the medicine into the lungs.
4.NounA device that heated viscous liquid motor fuel, especially tractor vaporising oil, to enable an engine to run on it.