1. (n.) Partial or total darkness; thick shade; obscurity; as, the gloom of a forest, or of midnight.

2. (n.) A shady, gloomy, or dark place or grove.

3. (n.) Cloudiness or heaviness of mind; melancholy; aspect of sorrow; low spirits; dullness.

4. (n.) In gunpowder manufacture, the drying oven.

5. (v. i.) To shine or appear obscurely or imperfectly; to glimmer.

6. (v. i.) To become dark or dim; to be or appear dismal, gloomy, or sad; to come to the evening twilight.

7. (v. t.) To render gloomy or dark; to obscure; to darken.

8. (v. t.) To fill with gloom; to make sad, dismal, or sullen.