leaden /ˈlɛdən/adjective 5verb 1forms 5 adjective5 •Of or related to the metal lead. •(figurative) Resembling the color of lead, metallic or dark gray; (of daylight) dim, overcast.The sky was dark and overcast, a leaden pall producing a deep gloom. •(figurative) Resembling the density of lead, heavy.Where but to think is to be full of sorrow And leaden-eyed despairs, Where Beauty cannot keep her lustrous eyes, Or new Love pine at them beyond to-morrow. — 1819 •(figurative) Resembling the ponderousness of lead, sluggish. •(no longer used) Made of lead. verb1 •To make or become dull or overcast. formsleadened · leadening · leadens · more leaden · most leaden