sunlessness noun2 •The state or characteristic of being without the sun or sunshine.In Penzance and Falmouth, the total eclipse will last for 2 minutes 2 seconds. The longest period of sunlessness will be in Romania, at 2 mins 23 seconds. — 1999 •(figurative) Dreariness, joylessness.The honor she paid the honesty of these women helped her much to pity the sunlessness of their existence, and the poor end for which they lived. — 1882
