The traveler walked away from the house and was soon swallowed up by the gloom of the night.
The knight and his lady sought refuge from the blazing sun in a leafy gloom.
The gloom of the atmosphere in the house was obvious as soon as I arrived.
The day started out bright and sunny, but the sky gloomed in the afternoon.
The teenager gloomed in a corner.
The news gloomed our mood.
An early meaning of gloom in Scotland was a sullen look, but this meaning is now archaic.
Gloom dates back to the mid-14th century. The Middle English verb gloumben or gloumen originally meant 'to frown.' It is thought to have come from an unrecorded Old English verb, which some linguists have suggested would have been glūmian, though its origin before then is uncertain. Many linguists believe the origin was Germanic, and point to the early German gläumen (to make turbid), the Low Germanic glum (gloomy, turbid or troubled), and the Dutch gluren (to leer) as related words. Others think the source was Scandinavian, and it is related to the dialectal Norwegian glome (to stare somberly). Either way, it is related to the English adjective glum. The noun, which originally meant 'a sullen look' in Scottish dialect, dates back to the mid- to late 16th century. The meaning 'darkness or obscurity' dates back to the early 17th century; the first recorded appearance is in a poem by John Milton. The sense 'melancholy, dejection or cheerlessness' was first recorded in the 18th century for the noun, but a similar sense had appeared as the adjective gloomy a century earlier, so some linguists think it was used for the noun sooner, but not recorded.