an elf in fairy stories who sprinkles sand in children's eyes to make them sleepy
"The little girl waited for her favorite story about the Sandman, hoping he would sprinkle his magic dust so she could finally fall asleep."
A figure that brings sleep and dreams by sprinkling magical sand into people's eyes.
"The little boy waited in his bed, convinced the Sandman would soon arrive to sprinkle magic dust on his eyelids so he could dream all night long."
A surname.
"My neighbor, Mr. Sandman, always brings over fresh bread on Sundays."