the mains
plural nounDefinition of the mains
British
: the system of pipes or wires for electricity, gas, or water
My radio runs either off batteries or off the mains.
—often used as mains before another noun We haven't had any mains water/electricity since the storm.
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“The mains.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/the%20mains. Accessed 8 Aug. 2022.
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