What is the meaning of reddened?

verb

• Turn red, as if in embarrassment or shame.
  • usage: "The girl blushed when a young man whistled as she walked by"
  • synonyms: blush, crimson, flush, redden
• Make red.
  • usage: "The setting sun reddened the sky"
  • synonyms: redden
• Turn red or redder.
  • usage: "The sky reddened"
  • synonyms: redden

adjective

• Especially of the face. ( reddened or suffused with or as if with blood from emotion or exertion)
  • usage: "crimson with fury"; "turned red from exertion"; "with puffy reddened eyes"; "red-faced and violent"; "flushed (or crimson) with embarrassment"
  • synonyms: crimson, red, red-faced, flushed
• Lighted with red light as if with flames.
  • usage: "streets ablaze with lighted Christmas trees"; "the inflamed clouds at sunset"; "reddened faces around the campfire"
  • synonyms: ablaze, inflamed