1. (v. i.) 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.

2. (v. t.) To make white; to bleach; to blanch; to whitewash; as, to whiten a wall; to whiten cloth.

achromatize besnow blanch bleach bleach out blench blush bowdlerize chalk change color clean clean out clean up cleanse clear out color crimson darken decolor decolorize delouse depurate deterge dim discolor drain drain of color dry-clean dull dust dust off etiolate expurgate extenuate fade fade out flush freshen frost fume gloss over glow grizzle grow pale lighten look black lose color lustrate mantle pale peroxide purge purify redden reform scavenge silver spruce steam-clean sugarcoat sweep out sweeten tarnish tidy tone down turn color turn pale turn red turn white varnish veneer wan wash out white whitewash wipe wipe off wipe out wipe up