The thinning of paint with turpentine.    From Wordnet, Princeton University. 

Adjective : thin ice. ,a thin wire. ,a thin man. ,thin vegetation. ,thin soup. ,a very thin plot for such a long book. ,a thin voice. ,a thin smile. ,a thin wine.    From Dictionary.com. 

Adverb : Slice the ham thin.    From Dictionary.com. 

Verb (used without object) : The crowd is thinning out.    From Dictionary.com. 

They have until fall to study Bell's proposal for longer-term thinning and tending to improve timber quality.    From Wordnik.com.  [Kootenay Rockies - News] Reference

The long-term thinning trend is evident from observations, as well as computer modeling of the Arctic climate.    From Wordnik.com.  [Arctic sea ice melting unusually fast] Reference

It's called thinning the herd. said Jellio on April 14, 2008 1:40 PM.    From Wordnik.com.  [YesButNoButYes: Do not try this at home ???] Reference

'I have blotted out as a cloud' -- that is, the thinning away of the mist.    From Wordnik.com.  [Expositions of Holy Scripture Isaiah and Jeremiah] Reference

The thinning is probably much worse, but I can’t find much information about this.    From Wordnik.com.  [AL GORE WINS NOBEL PEACE PRIZE! | Inhabitat] Reference

"I understand the idea of thinning for the health and betterment of the forest over all.".    From Wordnik.com.  [Sierra Sun - Top Stories] Reference

I set the trees twenty-four feet each way, with the idea of thinning later when they begin to crowd.    From Wordnik.com.  [Northern Nut Growers Association Report of the Proceedings at the 43rd Annual Meeting Rockport, Indiana, August 25, 26 and 27, 1952] Reference

I like the idea of thinning our classroom walls and allowing connections to be formed between concepts from other subject areas.    From Wordnik.com.  [Robin Good's Latest News] Reference

So we have Clute's "thinning", the world mirroring the protagonist's deteriorating resistance.    From Wordnik.com.  [Archive 2008-01-01] Reference

Sarah asked why he was "thinning" the onions and he explained that he pulled out some to give those left more room to grow.    From Wordnik.com.  [Rainbow Hill] Reference

However, she also sported a new hairdo which ECN was told involved a process of thinning which is supposed to provide a more youthful look.    From Wordnik.com.  [ANC Daily News Briefing] Reference

Brain 'thinning' may indicate susceptibility to depression.    From Wordnik.com. Reference

Rather, it keeps them all for 24 hours, then starts "thinning" them out.    From Wordnik.com.  [Discussions: Message List - root] Reference

They will also begin "thinning" the blossoms, to allow fewer, but larger apples to form.    From Wordnik.com. Reference

Specifique is designed to address issues of the scalp such as thinning hair, oiliness, and dandruff.    From Wordnik.com.  [All About The Pretty] Reference

With a lot of garbage clean up, some upgrading, and some stray dog 'thinning' this could be an absolutely beautiful island.    From Wordnik.com.  [TravelPod.com TravelStream™ — Recent Entries at TravelPod.com] Reference

As the front moves east, it has been slowing and thinning, meaning storms would be scattered instead of a solid line of rain.    From Wordnik.com.  [Local News from The Gainesville Sun] Reference

Rural Fire Protection District, to allow for fire-mitigation efforts such as thinning dead stands of beetle-ravaged lodgepole pine.    From Wordnik.com.  [Denver Post: News: Breaking: Local] Reference

The result, in the heydays of cutbacks, 'thinning', and 'downsizing', was -- and is -- a decrease in the quality of the journalism.    From Wordnik.com.  [Tyee - Home] Reference

It’s what is technically described as a thinning, or a reduction in staff levels at various posts, which will be detailed in the release.    From Wordnik.com.  [Transcript - The Hon Stephen Smith MP, Minister for Foreign Affairs] Reference

"thinning" out the woods; but that was to be expected, as the Germans learned during the battle of the Somme.    From Wordnik.com.  [My Second Year of the War] Reference

It is known as the thinning hair system.    From Wordnik.com.  [TravelPod.com TravelStream™ — Recent Entries at TravelPod.com] Reference

Williams is taking blood-thinning medication for the clots.    From Wordnik.com.  [Mike Williams placed on reserve list] Reference

Add moisture and color to lips that may be dry and thinning.    From Wordnik.com.  [Vivian Diller, Ph.D.: Four Tips to Feel Beautiful at Any Age] Reference

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

In Japan, hundreds of small and midsize cities are thinning out.    From Wordnik.com.  [The Shrinking Cities] Reference

Don't even think about it if you've got diseased or thinning gums.    From Wordnik.com.  [Move Over, Mona Lisa] Reference

Others came from state-owned companies simply thinning their ranks.    From Wordnik.com.  [Zhu Rongji's Promise] Reference

The Tbilisi evenings are turning bitterly cold, thinning the crowds.    From Wordnik.com.  [Descent Into Chaos] Reference

Blood-thinning treatment is given green light in America as profits forecast rises.    From Wordnik.com.  [AstraZeneca's good results boosted by US backing for Brilinta] Reference

So maybe it's no coincidence that the ranks of high-frequency traders are thinning.    From Wordnik.com.  [High-Frequency Traders Get A New Name] Reference

And iconhood has a downside: it leads to a certain thinning in how you're remembered.    From Wordnik.com.  [‘Me and Orson Welles’: The Boy-Wonder Years] Reference

The ice cap is thinning, glaciers are melting, and the process seems to be accelerating.    From Wordnik.com.  [Arctic Meltdown] Reference

Estrogen levels drop dramatically at menopause, thinning the vaginal wall and causing dryness.    From Wordnik.com.  [Still Sexy After All These Years] Reference

"July of 2011 next year, we're hoping to start thinning out our troops," is Obama's conclusion.    From Wordnik.com.  [Barack Obama on The View - as it happened] Reference

The Elantra and Tiberon models could have thinning of the steel in the front lower control arms.    From Wordnik.com.  [Recalls: Hyundai, Mazda, GM, and Jeep vehicles] Reference

The Balloon Made of the same material as a dry-cleaner's bag, the 2. 5-ton balloon swells as it rises into the thinning atmosphere.    From Wordnik.com.  [New High: A Helium Trip] Reference

Becker is 53, slender and boyish in a way that belies his thinning hair; his typical greeting to colleagues is a jaunty "What's up, guys?".    From Wordnik.com.  [Back From the Dead] Reference