a flash or beam of light

the gleam of a lantern in the dark.

a dim or subdued light.

a brief or slight manifestation or occurrence; trace

a gleam of hope.

to send forth a gleam or gleams.

to appear suddenly and clearly like a flash of light.

noun

dullness

verb

dull

noun

beam , brilliance , coruscation , flash , flicker , glance , glim , glimmer , glint , glitz , gloss , glow , luster , ray , scintillation , sheen , shimmer , splendor , twinkle , spark , wink , clinquant , fluorescence , fulguration , gleaming , lambency , luminosity , phosphorescence , sparkle

verb

beam , burn , coruscate , flare , flash , glance , glimmer , glint , glisten , glister , glitter , glow , radiate , scintillate , shimmer , shine , twinkle , blaze , incandesce , spangle , sparkle , wink , luminesce , fulgurate , phosphoresce