American Heritage Dictionary
(2)
Century Dictionary
(1)
GNU Webster's 1913
(2)
WordNet
(4)
Elsewhere on the web
It must be admitted that there is a degree of instability which is inconsistent with civilization.— Haddock Blogs
He also gets bonus points for mentioning that much of the instability is a direct effect of Western imperialism, which is undeniably true.— Classical Spin
"We are running out of time to help Pakistan change its present course toward increasing economic and political instability, and even ultimate failure," said a recent report by a task force of the Atlantic Council that was led by former senator Chuck Hagel of Nebraska and senator John Kerry of Massachusetts.— AfterDowningStreet.org - Bush-Cheney Trials in '09
"We are running out of time to help Pakistan change its present course toward increasing economic and political instability, and even ultimate failure," said a recent report by a task force of the Atlantic Council that was led by former Senator John Kerry of Massachusetts.— Bloggers.Pakistan
By 1967 instability was already setting in with power conflicts among two main political parties and various military factions, leading to many coups, attempted coups and counter-coups.— Mole's Progressive Democrat

Century Dictionary (1)
Bubble size: how much this word was used in a year
Bubble height: used more or less than expected, vs. all uses evenly distributed
You can expect to see this word about twice a week.
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