Gleam, v. t. [imp. & p. p. Gleamed; p. pr. & vb. n. Gleaming.] — Webster enters it under “gleam”
1. To shoot, or dart, as rays of light; as, at the dawn, light gleams in the east.
2. To shine; to cast light; to glitter.
Syn. -- To Gleam, Glimmer, Glitter. To gleam denotes a faint but distinct emission of light. To glimmer describes an indistinct and unsteady giving of light. To glitter imports a brightness that is intense, but varying. The morning light gleams upon the earth; a distant taper glimmers through the mist; a dewdrop glitters in the sun. See Flash.
3 other Webster entries under this spelling
Gleam, v. i.
(Falconry)
To disgorge filth, as a hawk.
Gleam, n.
1. A shoot of light; a small stream of light; a beam; a ray; a glimpse. Transient unexpected gleams of joi. Addison. At last a gleam Of dawning light turned thitherward in haste His [Satan's] traveled steps. Milton. A glimmer, and then a gleam of light. Longfellow.
2. Brightness; splendor. In the clear azure gleam the flocks are seen. Pope.
Gleam, v. t.
To shoot out (flashes of light, etc.). Dying eyes gleamed forth their ashy lights. Shak.
Shades of meaning
Fernald has no entry of its own for gleaming; he lists it under light.
He lists it without comment; the entries above explain its neighbors.