What is the meaning of the word "darkened"?

Definitions:

  1. Become or made dark by lack of light. copy to clipboard ADJECTIVE
    • The theater lights darkened, signaling the start of the movie. copy to clipboard
  2. Grown dark in color over time. copy to clipboard ADJECTIVE
    • The once-bright painting had darkened over the years due to exposure to sunlight. copy to clipboard

Synonyms: