Water

noun

1. A substance (of molecular formula H₂O) found at room temperature and pressure as a clear liquid; it is present naturally as rain, and found in rivers, lakes and seas; its solid form is ice and its gaseous form is steam.

   "By the action of electricity, the water was resolved into its two parts, oxygen and hydrogen."

2. The aforementioned liquid, considered one of the Classical elements or basic elements of alchemy.

   "And God said, Let the waters under the heaven be gathered together unto one place, and let the dry land appear: and it was so."

3. Water in a body; an area of open water.

   "The boat was found within the territorial waters."

4. A body of water, almost always a river.
5. A combination of water and other substance(s).