verb (used without object), verb (used with object)
to become or make bright or brighter.

1250–1300; Middle English brightnen. See bright, -en1

rebrighten, verb
unbrightened, adjective

lighten; cheer, gladden, lift, hearten, perk up.

darken; deject, sadden. Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2014.
Cite This Source Link To brighten
World English Dictionary
brighten (ˈbraɪtən)
1.  to make or become bright or brighter
2.  to make or become cheerful

Collins English Dictionary - Complete & Unabridged 10th Edition
2009 © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins
Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009
Cite This Source
Word Origin & History

O.E. *beorhtnian "to make bright" (see bright). Intrans. sense, "to become brighter," attested from c.1300. Figurative use from 1590s.
Online Etymology Dictionary, © 2010 Douglas Harper
Cite This Source
Example sentences
Their eyes began to sparkle, and their ugly faces to brighten, with an
  expression of strange pleasure.
My excuse is that winter is a-coming and any way of getting cyclists to
  brighten up their rides is a good one.
It would also brighten the prospects of other firms that are considering
  selling their patents.
If they do as they say, the unemployment picture will brighten considerably.
Copyright © 2014, LLC. All rights reserved.
  • Please Login or Sign Up to use the Recent Searches feature