A darkened house.    From Wordnet, Princeton University. 

The darkened margins of the paper.    From Wordnet, Princeton University. 

Verb (used with object) : He darkened the festivities by his presence.    From Dictionary.com. 

Ah, the thrill of sitting in darkened rooms - with boys!.    From Wordnik.com.  [Writing The Falco Series by Lindsey Davis] Reference

After 30 weeks in darkened solitary, he was moved to another cell.    From Wordnik.com.  [Long, Stephen G.] Reference

Goes and lies down in darkened room. on July 23, 2008 at 12: 03 am | Reply Bob.    From Wordnik.com.  [Makes You Proud, It Does. « POLICE INSPECTOR BLOG] Reference

He knew what Border-fighting was like, and his expression darkened for a moment.    From Wordnik.com.  [Magic's Promise]

His expression darkened with concern.    From Wordnik.com.  [Much Ado About Marriage] Reference

Medan's expression darkened, his tone grew bitter.    From Wordnik.com.  [Dragons of a Fallen Sun]

" His expression darkened slightly and his voice fell.    From Wordnik.com.  [Into the Thinking Kingdoms]

Yeden's expression darkened, but he just shook his head.    From Wordnik.com.  [Mistborn] Reference

Vena's expression darkened, and she turned to the servant.    From Wordnik.com.  [Werehunter]

Chinthliss 'expression darkened perceptibly, and he seemed to grow a little.    From Wordnik.com.  [Chrome Circle]

Lorne's expression darkened, body becoming rigid with tension, and Parrish's heart sank.    From Wordnik.com.  [Wraithbait] Reference

His addition didn't reas'sure Kyrtian in the least; Kyrtian's expression darkened further.    From Wordnik.com.  [Elvenborn]

But when Constance looked her way and noted the grin, her own expression darkened even more.    From Wordnik.com.  [Ascendance]

His expression darkened, the smile fading.    From Wordnik.com.  [Nevermore] Reference

His expression darkened, glowering down at her.    From Wordnik.com.  [My Soul to Keep] Reference

Sat in darkened classroom waiting for buzzer.    From Wordnik.com.  [I am not dead « We Don't Count Your Own Visits To Your Blog] Reference

However, minds can be "darkened" in various ways, not only through stupidity.    From Wordnik.com.  ["Test of Faith" launch] Reference

His expression darkened again.    From Wordnik.com.  [Stone of Tears]

His expression darkened slightly.    From Wordnik.com.  [Flinx's Folly]

His expression darkened ominously.    From Wordnik.com.  [Hair Raiser]

His expression darkened, he moved away.    From Wordnik.com.  [The Grass Crown]

Her expression darkened as she looked at it.    From Wordnik.com.  [Pregnant by the Millionaire]

Her expression darkened again, mistrustfully.    From Wordnik.com.  [The Gates of Noon]

A wallpaper to brightened (or 'darkened') your Halloween!.    From Wordnik.com.  [Aqua-Soft News] Reference

As Leiard’s expression darkened she felt a thrill of interest.    From Wordnik.com.  [The Last of the Wilds]

Chinthliss" expression darkened perceptibly, and he seemed to grow a little.    From Wordnik.com.  [The Chrome Borne]

“Isabelle,” Jace interrupted, but it was already too late; Sebastian’s expression darkened.    From Wordnik.com.  [City of Glass] Reference

His expression then darkened, though.    From Wordnik.com.  [WORLD OF WARCRAFT STORMRAGE] Reference

Richard's expression darkened to menacing.    From Wordnik.com.  [Unfinished Business]

Anatole's expression darkened yet further.    From Wordnik.com.  [Sepulchre]

His facial expression darkened with dismay.    From Wordnik.com.  [Atayde Hermanos Circus] Reference

Nancys expression darkened and her voice lowered.    From Wordnik.com.  [The House at Riverton] Reference

But years of economic struggle have darkened his mood.    From Wordnik.com.  [The New Misery Index] Reference

My thinning hair and darkened teeth ensured that I wouldn't be.    From Wordnik.com.  [Consumed by Guilt, I Just Stopped Eating] Reference

As book followed book, too, the tone darkened, the humor curdled.    From Wordnik.com.  [Literature: A Voice For Dire Times] Reference

Then you enter the darkened room with giant illuminated "touch tables.".    From Wordnik.com.  [THE MIND OF AN INVENTOR] Reference

When NEWSWEEK raised the subject with her in New Hampshire last week, she visibly darkened.    From Wordnik.com.  [The Relentless Mrs. Dole] Reference

Some of the new snacks being unveiled at the convention are best seen in a darkened theater.    From Wordnik.com.  [Arts Extra: Food Fight!] Reference

And since snakes are secretive animals, some are eager to wriggle into their darkened crates.    From Wordnik.com.  [Wildlife: Wrapping Up Reptiles] Reference