American Heritage® Dictionary of the English Language, Fourth Edition
- adj. Tending strongly to change: unstable weather.
- adj. Not constant; fluctuating: unstable vital signs.
- adj. Fickle.
- adj. Lacking control of one's emotions; marked by unpredictable behavior.
- adj. Not firmly placed; unsteady: an unstable ladder.
- adj. Chemistry Decomposing readily.
- adj. Chemistry Highly or violently reactive.
- adj. Physics Decaying with relatively short lifetime. Used of subatomic particles.
- adj. Physics Radioactive.
Century Dictionary and Cyclopedia
- To make no longer a stable or filthy abode.
- Not stable; not fixed.
- Not steady; inconstant; irresolute; wavering.
- adj. having a strong tendency to change
- adj. fluctuating; not constant
- adj. fickle
- adj. unpredictable
- adj. chemistry Readily decompasable
- adj. physics Radioactive, especially with a short half-life
GNU Webster's 1913
- adj. Not stable; not firm, fixed, or constant; subject to change or overthrow.
- adj. subject to change; variable.
- adj. disposed to psychological variability
- adj. highly or violently reactive
- adj. lacking stability or fixity or firmness
- adj. affording no ease or reassurance
- adj. suffering from severe mental illness
- un- + stable (Wiktionary)
“On the other hand, the term unstable does not necessarily mean that there are problems - rather, that enhancements or changes have been made to the software that have not undergone rigorous testing and that more changes are expected to be imminent.”
“Police also seized what they called unstable explosives stored in a heavily populated area of Copenhagen.”
“Keeping the rest of the world unstable is the name of the game.”
“And now that the fish farms are well established and oceanic temperatures and acidity levels are likely to remain unstable, it will be hard or impossible to set up well controlled experiments to find out. trackback”
“And sadly, it will continue to be true in unstable regions for years to come.”
““How unstable is he?” the Doctor asked grimly as they left the TARDIS at a jog.”
“Nevertheless, she adds, We also found that, particularly with trans people, they are very often unemployed or in unstable or unsuitable jobs because they choose to live in their gender roles.”
“But Pakistan will remain unstable and angry so long as the Kashmir conflict continues.”
“The net result is more under - or ungoverned spaces in unstable parts of the world.”
“Talbott responded that he believed - as did most of the national security community - that "US bases are anchors of instability in unstable regions.”
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Dearest creature in creation,
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