1) Dark 2) Darkness 3) Duskiness 4) Faintness 5) Gloom 6) Shade 7) Shadow 8) Subduedness 9) Vagueness 1) Darkness 2) Dreariness 3) Dusk characteristic 4) Dusk-like quality 5) Duskiness 6) Faint light 7) Gloom 8) Lack of light 9) Murk 10) Murkiness 11) Paleness 12) Quality of sunset 13) Reason for squinting 14) Semidarkness 15) Shade 16) Shadow 17) Stupidity 
• (n.) Dullness, or want of clearness, of vision or of intellectual perception. • (n.) The state or quality / being dim; lack of brightness, clearness, or distinctness; dullness; obscurity.
Dim'ness noun [ Anglo-Saxon dimness .] 1. The state or quality ... being dim; lack of brightness, clearness, or distinctness; dullness; obscurity. 2. Dullness, or want of clearness, of vision or of intellectual perception. Dr. H. More. Syn. -- Darkness; obscurity; ...
[n] - the state of being poorly illuminated 2. [n] - the property of lacking brilliance 3. [n] - the quality of being dim
noun the quality of being dim or lacking contrastduskiness noun the state of being poorly illuminated