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The Collaborative International Dictionary of English v.0.48 (gcide)

Whitening \Whit"en*ing\, n.
1. The act or process of making or becoming white.
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2. That which is used to render white; whiting. [R.]
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{Whitening stone}, a sharpening and polishing stone used by
cutlers; also, a finishing grindstone of fine texture.
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Whiten \Whit"en\, v. i. [imp. & p. p. {Whitened}; p. pr. & vb.
n. {Whitening}.] [OE. whitenen; cf. Icel. hv[imac]tna.]
To grow white; to turn or become white or whiter; as, the
hair whitens with age; the sea whitens with foam; the trees
in spring whiten with blossoms.
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