Definition of vaper in US English:

vaper

noun

informal
  • See vape

    • ‘No one knows what the long-term effect of inhaling nicotine vapour will be on "vapers".’
    • ‘A one-year vaper and former smoker, he likens e-cigarettes to any other ritualistic relaxant.’
    • ‘The quality of e-liquid and the condition of atomizers help a vaper get that perfect throat hit.’
    • ‘Some vapers say these devices have helped them reduce their smoking or quit altogether.’
    • ‘Being a heavy vaper, I was frustrated at how often I had to re-fill the tank.’