Entry 3 senses Webster, 1913 Sightless · Sight·less · IPA 01 a. Lacking sight; without sight; blind. 1. Lacking sight; without sight; blind. “Of all who blindly creep or sightless soar.” — Pope. 2. That can not be seen; invisible.[Obs.] “The sightless couriers of the air.” — Shak. 3. Offensive or unpleasing to the eye; unsightly; as, sightless stains.[R.]