After full moon comes the waning moon.    From Wordnet, Princeton University. 

The waning of his enthusiasm was obvious.    From Wordnet, Princeton University. 

The waxing and waning of the moon.    From Wordnet, Princeton University. 

Verb (used without object) : Daylight waned, and night came on. Her enthusiasm for the cause is waning. ,Colonialism began to wane after World War II. ,Summer is waning.    From Dictionary.com. 

Ten of my top 50 fish were caught on the new moon waning, which is twice the average.    From Wordnik.com.  [ESPN.com] Reference

Yet the scene in the dining-room of the Abbey Grange was sufficiently strange to arrest his attention and to recall his waning interest.    From Wordnik.com.  [The Return of Sherlock Holmes] Reference

As economies in the rest of the world slow, demand for raw materials appears to be waning, which is taking pressure off commodity prices.    From Wordnik.com.  [Dollar's Rise Could Damp Inflation] Reference

… but, alas, its reliability is waning, which is foreboding of demise.    From Wordnik.com.  [Putting Twitter on Notice] Reference

His theory's unhappy success was, thankfully, soon followed by its "waning".    From Wordnik.com.  [Professing Literature: John Guillory's Misreading of Paul de Man] Reference

Thus, the the factors that caused the "waning" of other "rocket dockets" are not applicable to E.D. Texas.    From Wordnik.com.  [Ex-PTO Commisioners Weigh in on Patent Reform] Reference

It's funny that I found it when the "waning" of the influence of Silicon Valley has been on my mind since I read this BBC post.    From Wordnik.com.  [the end of techie world as we've known it] Reference

Onshore drilling, I think you're going to see some of it, but it's kind of waning a little bit.    From Wordnik.com.  [SeekingAlpha.com: Home Page] Reference

"It was kind of waning for a while, but I think it's on the rise," Wysocki said of growers organized in cooperatives.    From Wordnik.com.  [Local News from The Gainesville Sun] Reference

UK global clout 'waning' - Hague.    From Wordnik.com.  [BBC News | News Front Page | UK Edition] Reference

And pallor ornamenting brow as though ’Twere wanness such as waning crescents show.    From Wordnik.com.  [The Book of The Thousand Nights And A Night] Reference

"calming progressively"; and at the beginning of November the police reported that it was "waning" on the East Rand and in the Eastern.    From Wordnik.com.  [Contents:] Reference

The publicity may bring his waning influence to an end.    From Wordnik.com.  [Givens In Trouble] Reference

It tripled in part because cultural liberalism was waning.    From Wordnik.com.  [The Journey Up From Guilt] Reference

FOR STARTERS, THE ERA of the 9-to-5 workday is fast waning.    From Wordnik.com.  [It's A Woman's World] Reference

The lake's abundance, ecologists say, is showing signs of waning.    From Wordnik.com.  [Troubled Waters] Reference

The waning days of a great nation can be charted only in hindsight.    From Wordnik.com.  [Leg Waxing And Life Everlasting] Reference

Especially after 9/11, the antigovernment fever seems to be waning.    From Wordnik.com.  ['HE KNEW HOW TO LEAD A PEOPLE'] Reference

The industrial age created by the Rockefellers and Carnegies is waning.    From Wordnik.com.  [Big Brother's Holding Company] Reference

If it's Tuesday then it's time to bemoan the waning of American hegemony yet again.    From Wordnik.com.  [The Eagle Still Soars] Reference

And it's probably too soon to conclude that America's long romance with guns is waning.    From Wordnik.com.  [Annie, Don't Get Your Gun] Reference

Says Kim of her missing husband, "I want to believe he is alive, but my faith is waning.".    From Wordnik.com.  [Where Pirates Still Sail] Reference

Indeed, the era of absolute American domination, if it ever existed, is waning pretty fast.    From Wordnik.com.  [Shadowland: Forget, Hell!] Reference

As tightened economic sanctions take hold in Belgrade, popular support for the war is waning.    From Wordnik.com.  [How Formidable A Foe?] Reference

Meanwhile, a powerful anti-inflationary force — cheaper manufactured imports — is waning.    From Wordnik.com.  [The Return of Inflation?] Reference

It was a covert, pro-contra propaganda tool during the waning days of the cold war in Nicaragua.    From Wordnik.com.  [West Wing Story: Dissing Tom Daschle] Reference

Then, with dictatorship waning in the late '70s, Niemeyer returned home and went straight to work.    From Wordnik.com.  [Skyline Sculptor] Reference

Instead, a speculative account on O'Neal's waning support among Merrill directors appeared on screen.    From Wordnik.com.  [Google: Glitch Not Racism] Reference

He did little to try to rebut that notion, keeping a light schedule even in the waning weeks of his campaign.    From Wordnik.com.  [A Complete and Utter Buzz Kill] Reference

As PCBs are waning, however, PBDEs and PFCs are taking their place and again showed up in the cord blood samples.    From Wordnik.com.  [Toxic Waste] Reference

And about conundrums that modern science confronts us with concerning the end of life and the waning of consciousness.    From Wordnik.com.  [THE POPE AND THE SURGEON] Reference

Nothing quite captured the gulf between Moscow's proud rhetoric and its waning influence than the squirming silence that followed.    From Wordnik.com.  [A Summit, But Not Of Equals] Reference

The baby could easily, I thought, be the poster child for this entire vicious election process and the waning years of Comrade Bob.    From Wordnik.com.  [‘Let’s Kill the Baby’] Reference

But I wonder whether as we furiously debate these matters in America, we resemble Englishmen in the waning days of the British Empire.    From Wordnik.com.  [WHAT BUSH AND KERRY MISSED] Reference

That will make Kim a respectable interlocutor for President Bill Clinton, who is expected to visit too in the waning weeks of his term.    From Wordnik.com.  [Korean Ties Looking All Bright] Reference