A small flash of light reflected from a shiny surface.
"A glint of sunlight caught the mirror."
A brief flash of a particular emotion, such as mischief or anger, visible in someone's eyes.
"There was a glint of amusement in her eyes as she spoke."
To give off small flashes of light.
"The dew on the grass glinted in the morning sun."
To reflect small flashes of light from a surface.
"The gold coins glinted in the dim light of the cave."