tap water

1. 1.

   water directly from the spigot

   Broaderwater

Questions about tap water

What does tap water mean?

tap water means "water directly from the spigot".

Is tap water a common word?

tap water is banded "Uncommon" — turns up in careful writing rather than conversation. The band comes from how often the word appears in a large corpus of everyday English, not from an editor's impression.