Sight"less, a.
1.
Wanting 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.]
Shak.
-- Sight"less*ly, adv.- Sight"less*ness, n.
© Webster 1913.