Webster’s Revised Unabridged Dictionary · 1913
Whiten
Whit′en (hwīt′'n), v. i. [imp. & p. p. Whitened; p. pr. & vb. n. Whitening.] [OE. whitenen; cf. Icel. hvītna.] 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.
Whit′en, v. t. To make white; to bleach; to blanch; to whitewash; as, to whiten a wall; to whiten cloth.
The broad stream of the Foyle then whitened by vast flocks of wild swans. Macaulay.
Syn. — See Blanch.