What is to make a small, shrill sound; as, the air sings in passing through a crevice. O'er his head the flying spear Sang innocent, and spent its force in air. Pope called?

sing — To make a small, shrill sound; as, the air sings in passing through a crevice. O'er his head the flying spear Sang innocent, and spent its force in air. Pope. (Webster's 1913.)