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Not changing or subject to change; constant.

in·var′i·a·bil′i·ty, in·var′i·a·ble·ness n.
in·var′i·a·bly adv.
American Heritage® Dictionary of the English Language, Fifth Edition. Copyright © 2016 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.
ThesaurusAntonymsRelated WordsSynonymsLegend:
Noun1.invariability - a quality of uniformity and lack of variation
regularity - the quality of being characterized by a fixed principle or rate; "he was famous for the regularity of his habits"
smoothness - the quality of having a level and even surface; "the water was a glassy smoothness"; "the weather system of the Pacific is determined by the uninterrupted smoothness of the ocean"
unevenness, variability - the quality of being uneven and lacking uniformity
2.invariability - the quality of being resistant to variation
unchangeability, unchangeableness, unchangingness, changelessness - the quality of being unchangeable; having a marked tendency to remain unchanged
unvariedness - characterized by an absence of variation
variability, variableness, variance - the quality of being subject to variation
Based on WordNet 3.0, Farlex clipart collection. © 2003-2012 Princeton University, Farlex Inc.
References in classic literature ?
So assured, indeed, is the fact concerning the periodicalness of the sperm whale's resorting to given waters, that many hunters believe that, could he be closely observed and studied throughout the world; were the logs for one voyage of the entire whale fleet carefully collated, then the migrations of the sperm whale would be found to correspond in invariability to those of the herring-shoals or the flights of swallows.
The parameter [eta] represents the change rate of technical efficiency, and [eta] > 0, [eta] = 0, and [eta] < 0 represent the improvement, invariability, and deterioration of technical efficiency, respectively.
Pooling is usually applied after a convolutional layer in order to reduce information size and to offer more invariability to rotations, translations, and small variation in features.
As for the same kind of natural stone, the value of specific cutting energy fluctuates in a small scale under the invariability cutting conditions.
Universal properties include, among others, invariability in relation to changes in scale when all variables have values on an interval scale (or only on a quotient scale) or in relation to the indicator assuming a value a when the vector that describes the object, has after normalization, only values of a as coordinates.
He said that the principles of international law are the invariability of borders, territorial integrity.
A total of 17088 unique genes were subjected to expression based filter and variance based filter, two functions embedded in DCGL to filter out genes that expressed extreme invariability across control and AD samples yielding 8544 and 2918 genes, respectively (Supplementary file 1).
The particles in the atmosphere then block solar radiation and create temperature invariability, which drives high-speed winds resulting in occasional planet-covering dust-storms.&nbsp;
Several robustness checks were conducted to reduce biases in estimates: heteroscedasticity, autocorrelation, and a unit root/stationary test, which was undertaken to ensure the temporal invariability of statistical properties such as mean, variance, and autocorrelation, among others.