(British, countable, dated) A spa.
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(Canada, uncountable) Electrical power supply; specifically, electrical power provided by a utility (as a publicly-owned one); payment or bills for this.
He crashed his car against a hydro pole.
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(uncountable, rare) Water.
He grabbed a bottle of hydro from the bureau and fumbled nervously to open it.
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Regional slang from around the English-speaking world — British, Australian, Irish, Caribbean, Nigerian, Filipino, AAVE, and the hyphenated-English dialects that make the internet sound local.
See all Regional & Other slang on Slangora.