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Related to instability: hemodynamic instability, Microsatellite instability, mental instability, shoulder instability
1. tendency to variable or unpredictable behaviour
2. Physics a fast growing disturbance or wave in a plasma
Collins Discovery Encyclopedia, 1st edition © HarperCollins Publishers 2005
A condition of a control system in which excessive positive feedback causes persistent, unwanted oscillations in the output of the system.
A property of the steady state of a system such that certain disturbances or perturbations introduced into the steady state will increase in magnitude, the maximum perturbation amplitude always remaining larger than the initial amplitude.
McGraw-Hill Dictionary of Scientific & Technical Terms, 6E, Copyright © 2003 by The McGraw-Hill Companies, Inc.
In a structure, the sudden loss of stiffness that limits its load-carrying capability, and in some cases results in the structure’s failure.
McGraw-Hill Dictionary of Architecture and Construction. Copyright © 2003 by McGraw-Hill Companies, Inc.
ii. A tendency of a body to continue moving away from its original state when disturbed by an external force and to continue after that force has been withdrawn.
iii. The failure of structures, such as the buckling of plates and panels under compression, and the failure of struts under end loads.
An Illustrated Dictionary of Aviation Copyright © 2005 by The McGraw-Hill Companies, Inc. All rights reserved