WHITEN, verb transitive hwitn. To make white; to bleach; to blanch; as, to whiten cloth. WHITEN, verb intransitive To grow white; to turn or become white. The hair whitens with age; the sea whitens with foam; the trees in spring whiten with blossoms.
Source: Webster's 1828 American Dictionary ↗ · public-domain · returned verbatim, no AI