hydrated

American

[hahy-drey-tid] / ˈhaɪ dreɪ tɪd /

adjective

chemically combined with water in its molecular form.
(of paper pulp) beaten until gelatinous for making into water-resistant paper.

hydrated British

/ ˈhaɪdreɪtɪd /

adjective

(of a compound) chemically bonded to water molecules

"Collins English Dictionary — Complete & Unabridged" 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012

Other Word Forms

nonhydrated adjective
unhydrated adjective

Etymology

Origin of hydrated

First recorded in 1800–10; hydrate + -ed ²

Example Sentences

Examples are provided to illustrate real-world usage of words in context. Any opinions expressed do not reflect the views of Dictionary.com.

As the water disappeared, hydrated ferrous sulfates were left behind.

From Science Daily • Mar. 10, 2026

Stay hydrated, touch grass, see your friends, tell the people you love that you love them.

From Salon • Mar. 8, 2026

Anisimova, beaten finalist last year at Wimbledon and the US Open, said keeping hydrated the day before and on match day was crucial.

From Barron's • Jan. 24, 2026

Dr Fathahudeen says those who can should strictly keep their children indoors and make sure they are properly hydrated and wear N95 masks - which filter out 95% of the pollutants - when outdoors.

From BBC • Nov. 26, 2025

We were hydrated yesterday, but we’ve also been sweating a great deal in this heat.

From "Dry" by Neal Shusterman and Jarrod Shusterman

Definitions and idiom definitions from Dictionary.com Unabridged, based on the Random House Unabridged Dictionary, © Random House, Inc. 2023