Added 9 October 2026 sightless adjective Categories: Describing WordsRare Words adjective ! Definition from Wiktionary (CC BY-SA). More about sightless at Wordnik → Where our words come from → Without sight; blind; unseeing. Synonym of invisible. Related Words: eyelessunseeingblindunsightednonsightedgazelessdarkvisionlessblindlessblindedunvisionedviewless Back to today's word