hydro

1 of 2

noun (1)

hy·​dro ˈhī-(ˌ)drō How to pronounce hydro (audio)
plural hydros
British
: an establishment offering hydropathic treatment (as for weight loss) : health spa

hydro

2 of 2

noun (2)

often attributive
: hydroelectric power

Examples of hydro in a Sentence

Recent Examples on the Web
Examples are automatically compiled from online sources to show current usage. Read More Opinions expressed in the examples do not represent those of Merriam-Webster or its editors. Send us feedback.
Noun
Bull Shoals was six feet from the conservation pool level, but Beaver, Table Rock, Bull Shoals, Norfork and Greer's Ferry are all lakes that generate hydro-power, which will be reduced because of the low water conditions. — Arkansas Online, 27 Oct. 2026 For a second, everything went from color to black-and-white as the drama intensified and the two powerful Pokémon blasted each other with a hyper beam and hydro pump. — Jordan Moreau, Variety, 25 Oct. 2026 Customers can do the treatment fully clothed as the water rolls under them, powered by a series of hydro-jets. — Samantha Conti, Footwear News, 8 Oct. 2026 And some projects like hydro dams may be permanently shelved, hindering Nepal’s ambitions to diversify its economy by exporting energy to neighbors like India and Bangladesh. — Stephanie Yang, CNN Money, 11 Sep. 2026 See All Example Sentences for hydro

Word History

Etymology

Noun (1)

short for hydropathic establishment

Noun (2)

short for hydropower

First Known Use

Noun (1)

1882, in the meaning defined above

Noun (2)

1916, in the meaning defined above

Time Traveler
The first known use of hydro was in 1882

Rhymes for hydro

See All Rhymes for hydro

Browse Nearby Words

hydriotaphia
hydro
hydroabietyl alcohol
See all Nearby Words

Cite this Entry

“Hydro.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/hydro. Accessed 28 Oct. 2026.

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Kids Definition

hydro

noun
hy·​dro
ˈhī-drō
: hydroelectric power

Medical Definition

hydro

noun
hy·​dro ˈhī-(ˌ)drō How to pronounce hydro (audio)
plural hydros
British
: a hydropathic facility : spa
also : a hotel catering to people using such a facility
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