reservoir.

1. A natural or constructed place where water is stored for later use.

2. A supply or store from which something can be drawn or maintained.

Use it for

Words that belong together

• water reservoir
• reservoir level

On the page

The reservoir fell below its winter level.

Usage notes

Primary category: setting / environment. Forms: Singular reservoir; plural reservoirs. Legacy lexical fields mirror sense 1 only. Use numbered sense fields for all meanings. Established modern English lexical item. No separate regional spelling or grammatical inflection entry. Commonness: moderately common.