Added 9 October 2026 headwater noun Categories: PlacesRare Words noun ! Definition from Wiktionary (CC BY-SA). More about headwater at Wordnik → Where our words come from → The source (and the initial part) of a stream. Origin From head + water. From Wiktionary, via Kaikki.org (CC BY-SA) Related Words: upstreamuprivermastheadheadendheaderheadstreamheadwellheadwaterheadstillheadboroughheadheadstead Back to today's word