Definition of ultra-clean in English:

ultra-clean

adjective

  • Extremely clean:

    ‘an ultra-clean home’
    • ‘If the government is serious about reducing the levels of pollution caused by private transport, it should reduce tax on the latest ultra-clean cars now coming on the market.’
    • ‘There are potential markets for ultra-clean coal technology all over the world - and not only for power generation.’
    • ‘Efficient, fast, cheap and ultra-clean, this subway system not only offers archaeology and contemporary art, it sings to you too.’
    • ‘The stations were air-conditioned and ultraclean.’
    • ‘We ate at an ultra-clean vegetarian fast food joint called Bio-K.’
    • ‘Preparing ultra clean water is a heroic task.’
    • ‘Engineers in Nottingham are developing ultra-clean coal that could make power generation 50% more efficient and reduce carbon dioxide emissions by a third.’
    • ‘There has been an assumption that it would be too expensive to produce ultra-clean coal.’
    • ‘An ultra-clean lifestyle actually depletes our ability to combat illness.’
    • ‘For the first time in history, we might see public toilets that are ultra-clean and highly sanitized.’
    • ‘Technicians will be hard at work this week, planning the cabling and ducting and preparing the anti-static, ultra-clean environment where the next generation of circuit-boards will be designed and built.’
    • ‘Hard drives are assembled in the same kind of ultraclean factories used to make microchips, so flooded production lines must be thoroughly sanitized.’
    clean, spotless, pristine, unsoiled, unstained, unsullied, speckless, ultra-clean
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