Definition of mountainous | Bee Dictionary of English

s having hills and crags
s like a mountain in size and impressiveness
mountainous waves
a mountainous dark man
s containing many mountains

But not all Hmong made it to America: 15,000 of Vang's brethren were cut off from escape and were forced to melt away into the mountainous jungles of Laos.
Pakistani intelligence sources, who monitor the mountainous regions where Bin Laden is believed to be hiding out, had also dismissed the reports of the terror leader's death.
It's not very often that a monarch willingly relinquishes his own castle, but Ghazanfar Ali Khan II, a descendant of the ruling Mirs (or Kings) of Hunza in Pakistan's mountainous .

Conflict with Armenia Could Reignite During Azeri Election
Almost two decades ago, the big guns fell silent in the war between Armenians and Azeris over a mountainous corner of Azerbaijan called Nagorno-Karabakh. Today, the 1994 ceasefire trench lines remain frozen in place. But Azerbaijan holds presidential elections in October. Now, some fear this frozen conflict could reignite over Nagorno-Karabakh, a self-proclaimed republic that is not recognized ...
June 13, 2013 - Voice of America
Nagorno-Karabakh
Almost two decades ago, the big guns fell silent in the war between Armenians and Azeris over a mountainous corner of Azerbaijan called Nagorno-Karabakh.
June 13, 2013 - Voice of America
Boulder County crews rescue stranded teen in St. Vrain River
A teenage girl is safe after being separated from her inner tube while tubing the St. Vrain River and being stranded on a mountainous bank on the west side of Lyons' Meadow Park on Wednesday, according to the Boulder County Sheriff's Office.
June 13, 2013 - Loveland Reporter-Herald

Gordon Brown in Reuters India
There is a crucible of terrorism in the mountainous border between Afghanistan and Pakistan,Brown said before landing in Afghanistan to discuss his strategy with President Hamid Karzai.
Sakakibara in Swissinfo
He's not only the greatest aviator in the world, he's also the greatest gliding pilot in the world ...... I'm very confident that he would have got the plane down in one piece as long as the terrain below him was desert and not mountainous hills or... Richard Branson http://www.google.com/url?q=http://en.wikipedia.org/wiki/Richard_Branson&source=dictionary&usg=AFQjCNG7-Fe4wuw6Nitjc-Ib0OSZ3uCM6A Reuters Canada http://www.google.com/url?q=http://ca.today.reuters.com/news/newsArticle.aspx%3Ftype%3DtechnologyNews%26storyID%3D2007-09-05T153630Z_01_N05213136_RTRIDST_0_TECH-FOSSETT-TECH-COL.XML&source=dictionary&usg=AFQjCNHZ5kOwBDTtivRWWtX0YoRoCEA0DQ Sep 5, 2007 65565 87066 mountainous It's a very mountainous area and if the roads are cut, even if you call out the troops, you can't get in," said Masaaki Sakakibara, a military official in charge of coordinating rescue operations in Kurihara, near the quake epicentre. "We...