Definition of "darkens" [darkens]

• Third-person singular simple present indicative form of darken. (verb)

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• "As it is, I do not think I have lost anything, except one's skin darkens from the sun, and one feels weak from the heat; but I could recover in six months in England."
• "So, when the lizard is stressed, it's skin darkens and provides greater emphasis for the reflective scales."
• "But”—his expression darkens—“Cecil’s spleen is enlarged too."