Definition from Wiktionary, the free dictionary
- present participle of crimson
1914, James Oliver Curwood, Kazan:
- Gray Wolf came to his side and licked his neck, where fresh blood was crimsoning his tawny hide.
1912, Frederick Palmer, Over the Pass:
- Her breaths were coming in a happy storm, her face crimsoning, her nostrils playing in trembling dilation.