English Reference
Noun

hydration

n. uncountable
B2 Upper Intermediate US /haɪˈdɹeɪʃən/ UK /haɪdɹˈeɪʃən/ hy·dra·tion UK spelling hydrations Biology Chemistry Web Development

n.the process of giving your body the water it needs to stay healthy. It also refers to the state of having enough water in your system. In computing, hydration is the process of adding data or interactivity to a simple web page or object to make it fully functional.

n.the process of causing something to absorb water; the physiological state of maintaining adequate fluid balance within an organism. In software development, hydration refers to the process of attaching event listeners and state to static HTML, or filling a data object with information from a database.


SIMPLE

Drinking water throughout the day is essential for proper hydration.

CONTEXTUAL

Athletes must focus on hydration before, during, and after a race to prevent muscle cramps and fatigue.

COMPLEX

In clinical settings, intravenous hydration is often administered to patients who are unable to maintain fluid levels orally due to severe illness or surgical recovery.

Usage

Uncountable in its general physiological sense; often paired with the adjective 'proper' or 'adequate'.

Every aspect of human health matters, including the ability to eat and drink comfortably enough to maintain nutrition and hydration.

The Conversation· 3 Aug 2026

Dr Daly says one or two coffees a day should make little difference to your hydration levels - but five or six will start to have an effect.

BBC News· 8 Jul 2026

From hydrate + -ion. The programming terms come from the concept of data lake.

Etymology adapted from Wiktionary, available under CC BY-SA 4.0.

This entry
Level B2 · Upper Intermediate
Frequency Occasional
Updated