Second-person singular simple present form of light.(verb)
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Use "lightest" in a sentence
"It does not in the least follow that the darkest spot should be the purest; still less so that the lightest should be the purest."
"By contempora ry observations of between five and six weeks, the averaged and almost unvaried difference of the height of mercury in the barometer, at those two places, was .784 of an inch, the atmosphere at Monticello being so much the lightest, that is to say, about one-thirty-seventh of its whole weight."
"Lucy's every word, sweet or bitter, and recalled her lightest action -- _Meminerunt omnia amantes_ -- and every now and then he looked sadly into Eve's keen little face for his doom."