crimsonnoun/ˈkɹɪmzən/

• 1

  A deep, slightly bluish red.

  • To my horror I perceived that the yellow blossoms were all dabbled with crimson.

crimsonadj/ˈkɹɪmzən/

• 1

  Having a deep red colour.

  • Breezes blowing from beds of iris quickened her breath with their perfume; she saw the tufted lilacs sway in the wind, and the streamers of mauve-tinted wistaria swinging, all a-glisten with golden bees; she saw a crimson cardinal winging through the foliage, and amorous tanagers flashing like scarlet flames athwart the pines.
  • Her crimson dress inflames grey corridors, or flaring in a sunshaft through high branches makes of the deep green shadows a greenness darker yet, and a darkness greener.
• 2

  Immodest.

crimsonverb/ˈkɹɪmzən/

• 1

  To become crimson or deep red; to blush.

  • Eugenie's quick apprehensions seized the foul thought. Her eyes flashed—her cheek crimsoned.
  • 1885, Alfred, Lord Tennyson, “The Ring” in The Poetical Works of Alfred, Lord Tennyson, New York and Boston: Thomas Y. Crowell & Co., Volume 2, p. 662, Father. Why do you look so gravely at the tower? Miram. I never saw it yet so all ablaze With creepers crimsoning to the pinnacles,
• 2

  To dye with crimson or deep red; to redden.

  • Here didst thou fall; and here thy hunters stand, Sign’d in thy spoil, and crimson’d in thy lethe.
  • Her face was crimsoned over, and she exclaimed, in a voice of the greatest emotion, “Good God! Willoughby, what is the meaning of this? […]”