1. Obscurity; partial or total darkness; thick shade; as the gloom of a forest, or the gloom of midnight.
2. Cloudiness or heaviness of mind; melancholy; aspect of sorrow. We say, the mind is sunk into gloom; a gloom overspreads the mind.
3. Darkness of prospect or aspect.
GLOOM, verb intransitive To shine obscurely or imperfectly.
1. To be cloudy, dark or obscure.
2. To be melancholy or dejected.
GLOOM, verb transitive To obscure; to fill with gloom; to darken; to make dismal.