• WordNet 3.6
    • v deteriorate grow worse "Her condition deteriorated","Conditions in the slums degenerated","The discussion devolved into a shouting match"
    • v deteriorate become worse or disintegrate "His mind deteriorated"
    • ***
Webster's Revised Unabridged Dictionary
  • Interesting fact: At the beginning of the year 2001 all Canadian cigarette packaging will depict graphic images of rotting teeth and deteriorating organs.
    • v. i deteriorate To grow worse; to be impaired in quality; to degenerate. "Under such conditions, the mind rapidly deteriorates ."
    • v. t Deteriorate To make worse; to make inferior in quality or value; to impair; as, to deteriorate the mind. "The art of war . . . was greatly deteriorated ."
    • ***
Century Dictionary and Cyclopedia
  • Interesting fact: Undertakers report that human bodies do not deteriorate as quickly as they used to. The reason, they believe, is that the modern diet contains so many preservatives that these chemicals tend to prevent the body from decomposition too rapidly after death.
    • deteriorate To make worse; reduce in quality; lower the essential character or constitution of: as, to deteriorate a race of men or their condition.
    • deteriorate To grow worse; be or become impaired in quality; degenerate.
    • ***
Chambers's Twentieth Century Dictionary
  • Interesting fact: Pollen never deteriorates. It is one of the few natural substances that lasts indefinitely.
    • v.t Deteriorate de-tē′ri-o-rāt to make worse
    • v.i Deteriorate to grow worse
    • ***


  • Charles Horton Cooley
    “To cease to admire is a proof of deterioration.”
  • Vince Lombardi
    “A school without football is in danger of deteriorating into a medieval study hall.”
  • T. S. Eliot
    “Each venture is a new beginning, a raid on the inarticulate with shabby equipment always deteriorating in the general mess of imprecision of feeling.”


Webster's Revised Unabridged Dictionary
L. deterioratus, p. p. of deteriorare, to deteriorate, fr. deterior, worse, prob. a comparative fr. de, down, away


In literature:

Their condition has deteriorated.
"Compilation of the Messages and Papers of the Presidents" by Grover Cleveland
Here he found, to his disappointment, that beaver fur had greatly deteriorated in value.
"Christopher Carson" by John S. C. Abbott
When your customers must take what you please to give them the quality of your goods is likely to deteriorate.
"The Congo and Coasts of Africa" by Richard Harding Davis
The incident proved the deterioration of the Grand Army from the times of Ulm and Jena.
"The Life of Napoleon I (Volumes, 1 and 2)" by John Holland Rose
Otherwise the balls would all too easily deteriorate into the character of public ones.
"Etiquette" by Emily Post
Bone and ivory soon deteriorate and become friable.
"Manual Of Egyptian Archaeology And Guide To The Study Of Antiquities In Egypt" by Gaston Camille Charles Maspero
Eight years leave their impress of mental growth or deterioration upon a man.
"The Uphill Climb" by B. M. Bower
A large part of the deterioration of the countryside is due to the deterioration of Buddhism.
"The Foundations of Japan" by J.W. Robertson Scott
It had merely become deteriorated.
"Vandover and the Brute" by Frank Norris
That which his friends had once dignified by the name of spiritual power had deteriorated into something but little above animal magnetism.
"The Redemption of David Corson" by Charles Frederic Goss
The over-elaboration of the late Tudor time corresponded with the deterioration shown in France in the time of Henry IV.
"Furnishing the Home of Good Taste" by Lucy Abbot Throop
During the regency and the reign of Louis XV the morals of the Court fast deteriorated.
"The Story of Versailles" by Francis Loring Payne
Recurrent strains continued over a long period indeed deteriorate even things which are inanimate.
"Rebuilding Britain" by Alfred Hopkinson
One can call these "degenerative" and consider them as an expression of hereditary deterioration.
"Three Contributions to the Theory of Sex" by Sigmund Freud
What are we to do to prevent further deterioration of vision?
"Scientific American Supplement No. 822" by Various
Out of Spain the Spaniard deteriorates, and nowhere so much as in South America.
"The Aldine, Vol. 5, No. 1., January, 1872" by Various
If all the water be expelled, the quality of the flour is deteriorated.
"The Commercial Products of the Vegetable Kingdom" by P. L. Simmonds
It needed only one glance into a handsome suite of an up-town hotel one week later to prove the rapid moral deterioration of the prodigal.
"Miss Mink's Soldier and Other Stories" by Alice Hegan Rice
Even the Boer language has deteriorated under the effects of isolation and a lower status of civilization.
"Influences of Geographic Environment" by Ellen Churchill Semple
In his walk and attitude the signs of the man's deterioration were obvious.
"The Lighted Way" by E. Phillips Oppenheim

In news:

The National Highway Traffic Safety Administration says the hoses can deteriorate prematurely, causing cracks and leaks.
A Las Vegas judge denied Floyd Mayweather's request to be remanded to house arrest for the remainder of his 87-day jail sentence and said any deterioration in his physical condition was his own fault.
The main reasons a hip deteriorates are arthritis and injury.
UK recruiter Hydrogen (HYDG:LSE) today reported that profits for the full year will be "significantly" below current market expectations as trading deteriorated in the second half of 2012.
A new report from the National Research Council, titled Corps of Engineers Water Resources Infrastructure: Deterioration, Investment, or Divestment.
As political instability continues in Iraq, the country's alliances are deteriorating.
Cormac McCarthy uses the question to highlight the thin line that separates right from wrong, good from bad, in a deteriorating world.
They will deteriorate the rubber gaskets, causing the toilet to leak into the bowl, therefore making the toilet refill constantly.
The deteriorating Hickam cabin at Rock Bridge Memorial State Park likely will be torn down unless a community group pitches in money to save it.
The famed "Iron Horse" showed up in Rochester in 1939 with puzzling symptoms: His hands ached, his legs felt weak, and his muscles were slowly deteriorating.
The building at 1131 Lake Street in Elmira used to be the home of Lovell 's Drug Store and soda counter, but since it closed, it's deteriorated into a drug house and safety hazard.
Living conditions in Gaza have deteriorated under Hamas rule, potentially leaving the Islamist militant group on the hook for rampant unemployment and other societal problems.
Mad cow disease causes severe nervous system deterioration and has been linked to a similar disease in humans.
FL@H has a multitude of Madagascar 's cinema, television, and radio recordings that must be digitized using SAMMAsolo to save them from deterioration.
Germany's biggest public pension fund said timber investments are helping to make up for a deteriorating real estate market as insurers compete for property deals.

In science:

However, the reduced screening due to unavoidably larger λ for large κ, led to rapid deterioration of our experimental resolution and, here, we opt to present the data for lower κ.
Non-Quantized Penetration of Magnetic Field in the Vortex State of Superconductors
When β is moved towards 2 the convergence of the series deteriorates.
Statistical ensemble of scale-free random graphs
As a consequence, the quality of the local update Metropolis Monte Carlo results deteriorates exponentially with increase of the system size.
An Introduction to Monte Carlo Simulation of Statistical physics Problem
As η goes down, f1 increases and the dilute approximation starts to deteriorate.
Symmetry-breaking instability in a prototypical driven granular gas
If on the other hand we decrease the level of randomization, we fall into a solid state which entails a rapid deterioration of the expected converence rate in return for a modest further reduction in variance.
Some Remarks on the Optimal Level of Randomization in Global Optimization
However, on the numerical side a fairly extensive simulation study reported in Section 3 suggests that, in practice, the deterioration in the non-Gaussian setting is fairly mild, provided that g is not drastically nonaffine in the relevant domain.
Estimation of fractal dimension for a class of Non-Gaussian stationary processes and fields
This finding is confirmed by the numerical MSE results in Section 3, though these results also suggest that the deterioration is not too severe provided that g is not drastically nonaffine over the relevant domain. 3.
Estimation of fractal dimension for a class of Non-Gaussian stationary processes and fields
However, the deterioration is fairly mild in most cases, except in the case of the log-normal(4) transformation, where there is a substantial increase in the MSE.
Estimation of fractal dimension for a class of Non-Gaussian stationary processes and fields
The viability of this approach and the reproducibility of the PSFs is examined, together with studies on the mean transparency, pixel-to-pixel variance and PSF deterioration due to partial shadowing.
Coded mask imaging of extended sources with Gaussian random fields
Finally, thresholded GRFs are introduced and the deterioration of the PSF of such thresholded realisations (Sect. 4.6) is addressed.
Coded mask imaging of extended sources with Gaussian random fields
The first one is to prove that for width 2 permutations the spectral gap does not deteriorate with k , as we believe, and is Ω(1/n) for all k .
Simple Permutations Mix Even Better
This can be achieved at the expense of a small deterioration of the bound on the right-hand side of (3.1).
Concentration of normalized sums and a central limit theorem for noncorrelated random variables
In addition to the crystals light output change, PMT gain instabilities could deteriorate the performance. A usual way to track the PMT gain variations is the use of a monitoring system with a light pulser.
Design and performance of LED calibration system prototype for the lead tungstate crystal calorimeter
Our previous studies showed that temperature variations deteriorate the performance stability of the LED monitoring system .
Design and performance of LED calibration system prototype for the lead tungstate crystal calorimeter
Kolos et al. [3a] say that the accuracy of their HH PEC deteriorates quickly with decreasing rAB.
Theoretical and observed potential energy curves for neutral 4-unit charge Coulomb systems containing antihydrogen