Mains may mean or refer to, or be a subject of:

• Mains electricity ("line power" in the United States)
• Electricity transmission
• Public utility, about "mains services", including electricity, natural gas, water, and sewage disposal
• Mains (Scotland), about the central steading of a townland
• BMX racing
• Water mains

See also:

• Main
• Mane

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