Definition of hydro in US English:



  • 1A hydroelectric power plant.

    • ‘After the station was in operation, some nearby farmers came and asked me if I could help them to build or establish their own hydro.’
    • ‘The hydro also provides cheap electricity.’
    • ‘However, as electricity prices have fallen steadily, refurbishment has become uneconomic particularly for hydros between 10 and 50 megawatts which account for about 70% of production.’
    • ‘The refurbishment of the larger hydros, many of which are around 50 years old, has generally added between 5 and 10% to their efficiency,’ said spokesman Bob Major.’
    1. 1.1 Hydroelectricity.
      • ‘In other words, oil is the precursor for other sources of energy; gas, coal, nuclear, solar, hydro, because these require oil fuel to create and maintain infrastructure.’
      • ‘On the books at the moment, we have hydro, wind, geothermal, gas, and what are described as ‘various other options’ for new electrical generation in this country.’
      • ‘The remaining energy sources, hydro, nuclear, biomass, geothermal, solar, and wind make up the balance.’
      • ‘In addition, the incentives for alternatives - such as hydro, solar, nuclear and - crucially biofuels - grow exponentially.’
      • ‘Most people who are off the grid (at least those living in the United States), rely on some combination of alternative energy such as wind, photovoltaic or hydro.’
    2. 1.2Canadian Electricity.
      • ‘When it comes to hydro, the standard line about more competition being good for the consumer just does not hold water.’
      • ‘They've set up a house bank account from which they pay the rent, hydro, internet and phone bills, and they're beginning to pool resources for organic groceries.’
      • ‘The investigating officer testified that the average home uses 30-50 kilowatts of hydro per day.’
      • ‘The former indicates that hydro is not included.’
      • ‘Crouching in a heavy oversized winter coat inside her wintry apartment, she explained why her and her four children have been without heat and hydro for the last two months, the coldest of the year.’
  • 2British A hotel or clinic originally providing hydropathic treatment.

    • ‘The treatments are available at Studios as well as at selected Salons and health hydros.’
    • ‘In August 1857, the Furness Line opened which led to the building of more and larger hotels and hydros.’
    • ‘And a guided walk will explore the hydro and school sites of the Victorian and Edwardian spa town.’
    • ‘She plans to work harder, build up a bigger client base and one day own a health hydro.’
    • ‘Programmes will prepare students for job opportunities in hotels, restaurants, lodges, conference facilities, theme parks, golf and country clubs, casinos, health hydros and airline catering companies.’


Late 19th century: abbreviation.