Webster's Revised Unabridged Dictionary · 1913

Gloom

Gloom (glom) , noun

[Anglo-Saxon glōm twilight, from the root of English glow. See Glow, and compare Glum, Gloam.]

1.
Partial or total darkness; thick shade; obscurity; as, the gloom of a forest, or of midnight.
2.
A shady, gloomy, or dark place or grove.
Before a gloom of stubborn-shafted oaks. — Tennyson
3.
Cloudiness or heaviness of mind; melancholy; aspect of sorrow; low spirits; dullness.
A sullen gloom and furious disorder prevailed by fits. — Burke
4.
In gunpowder manufacture, the drying oven.

Gloom , intransitive verb

1.
To shine or appear obscurely or imperfectly; to glimmer.
2.
To become dark or dim; to be or appear dismal, gloomy, or sad; to come to the evening twilight.
The black gibbet glooms beside the way. — Goldsmith
[This weary day]... at last I see it gloom. — Spenser

Gloom , transitive verb

1.
To render gloomy or dark; to obscure; to darken.
A bow window... gloomed with limes. — Walpole
A black yew gloomed the stagnant air. — Tennyson
2.
To fill with gloom; to make sad, dismal, or sullen.
Such a mood as that which lately gloomed Your fancy. — Tennison
What sorrows gloomed that parting day. — Goldsmith