Meaning

2 senses
  1. (not comparable, poetic)Dark; growing dark; darkening.

    (poetic) occurring in the dark or night

  2. (figuratively, not comparable)Obscure; taking place unseen, as if in the dark.

    uncannily or threateningly dark or obscure

Origin

Coined by Irish poet Mary Tighe in 1805, likely as an extension of the adverbial sense, an

Coined by Irish poet Mary Tighe in 1805, likely as an extension of the adverbial sense, and popularized by John Keats.

Wiktionary, CC BY-SA 4.0 · source

See also

neighbours in the dictionary
darkling — meaning, examples, forms, synonyms | Krumeto