Old houses are often so densely packed that perhaps three or four have to be demolished for every new one built.    From Wordnet, Princeton University. 

Adjective, : a dense forest; dense population. ,dense ignorance. ,a dense philosophical essay.    From Dictionary.com. 

The air is typically much worse in densely populated areas.    From Wordnik.com.  [The Dirt Gap] Reference

Even in densely packed urban areas like New York City, the prime real estate.    From Wordnik.com.  [Scientists Create New Super-Insulating Smart Roof From Cooking Oil | Inhabitat] Reference

But it could not be applied in densely populated areas like china an india.    From Wordnik.com.  [Ikea Organizes Furniture Swap] Reference

Hamas has intentionally set up camp from within densely populated civilian areas.    From Wordnik.com.  [Matthew Yglesias » Friedman to Palestinians: Suck on This] Reference

Some proportion of consumers will find mass transit efficient in densely populated areas.    From Wordnik.com.  [Mass Transit and Happiness, Arnold Kling | EconLog | Library of Economics and Liberty] Reference

Maybe going to far as requiring use of frangible ammo for self defense in densely populated areas.    From Wordnik.com.  [The Volokh Conspiracy » Kagan’s record on guns] Reference

This turns out to be a fairly easy task in densely populated areas and totally impossible in sprawl.    From Wordnik.com.  [Mass Transit and Happiness, Arnold Kling | EconLog | Library of Economics and Liberty] Reference

Grouped by walking distance in densely packed neighborhoods, cycling distance in suburbs, and by car in rural areas.    From Wordnik.com.  [Waldo Jaquith - Virginia Democratic list management software.] Reference

The slug's inherent short range is the reason behind shotguns-only legislation in densely populated parts of the country.    From Wordnik.com.  [Firstest With the Mostest] Reference

History has shown that building more densely is the default position for land development when left solely to its own devices.    From Wordnik.com.  [Matthew Yglesias » All Planning is Planning] Reference

S Carson Refinery located in densely populated southern Los Angeles.    From Wordnik.com.  [Rachel Morello-Frosch: Make a Mess, Clean It Up] Reference

They’re built within densely populated areas or tourist destinations, meaning foot traffic is not a problem.    From Wordnik.com.  [Dallas Blog, Daily News, Dallas Politics, Opinion, and Commentary FrontBurner Blog D Magazine » Blog Archive » Trinity Vote: I Am Not a Thinker. I Am a Driver.] Reference

Gaza's population is densely packed and very young.    From Wordnik.com.  [Sharon's Shadow] Reference

Paris is the most densely populated city in Europe.    From Wordnik.com.  [LES MISERABLES, INDEED] Reference

Denmark and Israel are small, densely populated countries.    From Wordnik.com.  [Switched-On Highways] Reference

The Alps are the most densely populated high mountain range in the world.    From Wordnik.com.  [Death In The Alps] Reference

Several artists have chosen to reflect on living in a densely populated city.    From Wordnik.com.  [Out Painting The Town] Reference

Most stories are also accompanied by rich and densely populated message boards.    From Wordnik.com.  [Is This the Future of Journalism?] Reference

He used densely woven poplin and buttons made out of Australian mother-of-pearl.    From Wordnik.com.  [Focus On Style] Reference

But Asia is so densely populated that the only form of entertainment is to go out and eat.    From Wordnik.com.  [A Tv Chef's Chinese Fare] Reference

They have asked for authority to target terrorists in more densely populated areas of Pakistan.    From Wordnik.com.  [The Drone Dilemma] Reference

Instead, they may strengthen their connections to one another, becoming more densely intertwined.    From Wordnik.com.  [Memory] Reference

When they emerge from the towel, you should have a bright green, densely packed disc in your hands.    From Wordnik.com.  [That's Rich!] Reference

By contrast, fruits, vegetables and whole grains are densely packed with life-sustaining compounds.    From Wordnik.com.  [Food Fight--Carbs Vs. Fat] Reference

Investigators believe the laser originated from the densely populated suburb of Warrensville Heights, Ohio.    From Wordnik.com.  [AIRPLANES: DANGEROUS DESCENTS] Reference

Already their presence, as illegals, has been felt in neighborhoods that are densely mixed and deeply troubled.    From Wordnik.com.  [Living Underground] Reference

It's still mostly poor and black, but much less densely populated, down two thirds in size since 1960, to 41,000.    From Wordnik.com.  [King's Final Years] Reference

The NEDs have better picture quality than both LCD and plasma because the tiny nano-tubes are more densely packed.    From Wordnik.com.  [End of the Big Binge] Reference

Without swift action, he and others warned, the virus will soon overrun the world's most densely populated countries.    From Wordnik.com.  [The Ever-Expanding Plague] Reference

It was so densely packed that I could barely free the cell phone from my pocket to dial my dad back home in the States.    From Wordnik.com.  [Can Les Bleus Cure France’s Blues?] Reference

Rats, on the other hand, may do better in densely mined fields, like those around Kabul, where dogs get easily confused.    From Wordnik.com.  [A NOSE FOR TROUBLE] Reference

Civil unrest is always worrisome in a densely populated nation that still ranks among the world's 50 poorest, to be sure.    From Wordnik.com.  [Bullish on Bangladesh] Reference

Not only would these quakes be more powerful than the Bhuj disaster, but they would occur in more densely populated areas.    From Wordnik.com.  [Rumble In The Himalayas] Reference

You don't need to be a Fascist or a Nazi to see the risks of mass immigration into an already densely populated continent.    From Wordnik.com.  [The Catholic Crisis] Reference

Historically, the heaviest loss of life has occurred when quakes with a maginitude of 7.0 or more hit densely populated areas.    From Wordnik.com.  [The Big One] Reference

It took J.R.R. Tolkien more than a thousand densely -- densely -- packed pages to answer that question in his trilogy of novels.    From Wordnik.com.  [Theater: 'Ring' a Ding Ding] Reference

Japan is a densely populated nation built around 86 active volcanoes, and last week one of the northernmost began to blow its top.    From Wordnik.com.  [Mt. Usu Blows Its Top] Reference