Definition of Retardation

1. Noun. A decrease in rate of change. "The deceleration of the arms race"

Exact synonyms: Deceleration, Slowing
Generic synonyms: Alteration, Change, Modification
Antonyms: Acceleration
Derivative terms: Decelerate, Decelerate, Retard, Retard, Slow, Slow

2. Noun. The extent to which something is delayed or held back.
Generic synonyms: Delay, Hold, Postponement, Time Lag, Wait
Derivative terms: Retard

3. Noun. Any agent that retards or delays or hinders. "Flame-retardant"
Exact synonyms: Retardant, Retardent
Generic synonyms: Agent
Derivative terms: Retard

4. Noun. Lack of normal development of intellectual capacities.

5. Noun. The act of slowing down or falling behind.
Exact synonyms: Lag, Slowdown
Generic synonyms: Delay, Holdup
Derivative terms: Lag, Retard, Retard, Slow Down, Slow Down, Slow Down, Slow Down

Definition of Retardation

1. n. The act of retarding; hindrance; the act of delaying; as, the retardation of the motion of a ship; -- opposed to acceleration.

Definition of Retardation

1. Noun. The act of retarding or delaying; hindrance. ¹

2. Noun. The extent to which anything is retarded; the result of any retarding or delay; mental, social, or physical slowness. ¹

3. Noun. That which retards; an obstacle; an obstruction. ¹

4. Noun. (physics) Deceleration; reduction in the magnitude of velocity. ¹

5. Noun. (music) A suspension which resolves upwards. ¹

¹ Source:

Definition of Retardation

1. [n -S]

Medical Definition of Retardation

1. Delay, hindrance, delayed development. Origin: L. Retardare = to slow down, impede This entry appears with permission from the Dictionary of Cell and Molecular Biology (11 Mar 2008)

Lexicographical Neighbors of Retardation

retardation (current term)
retardation plate
retarded dentition
retarded depression
retarding force

Literary usage of Retardation

Below you will find example usage of this term as found in modern and/or classical literature:

1. Handbook of Severe Disability: A Text for Rehabilitation Counselors, Other edited by Walter C. Stolov, Michael R. Clowers (2000)
"This ambiguity is particularly evident in the milder levels of mental retardation where an individual's behavior is judged to be "almost normal. ..."

2. The American Journal of Psychology by Granville Stanley Hall, Edward Bradford Titchener (1909)
"retardation AND DEPRESSION With this result the strictly experimental portion of our inquiry ends, but in closing, a few words may be devoted to the ..."

3. Yearbook of the National Society for the Study of Education by National Society for the Study of Education (1916)
"Statistics of the most value would be those of separate schools comparing retardation by grade and class over a period of years. Sufficient returns are not ..."

4. Journal of Nervous and Mental Disease by Philadelphia Neurological Society, American Neurological Association, Chicago Neurological Society, New York Neurological Association (1899)
"That retardation of the sensibility for pain is not at all rare in ... Most observers point out, also, that this retardation is often met with in the lower ..."

5. Journal of Nervous and Mental Disease by American Neurological Association, Philadelphia Neurological Society, Chicago Neurological Society, New York Neurological Association, Boston Society of Psychiatry and Neurology (1913)
"In regard to the first of these, retardation, I shall take for granted that ... On a somewhat different footing stands retardation the schools due to sense ..."

6. The Negro in Chicago: A Study of Race Relations and a Race Riot by Chicago Commission on Race Relations (1922)
"retardation I. retardation IN ELEMENTARY SCHOOLS With the assistance of the Board of Education a selection was made of three groups of schools to be studied ..."

7. The School as a Social Institution: An Introduction to the Study of Social by Charles Leonidas Robbins (1918)
"In the same cities boys and girls showing two years of retardation are ten and nine per cent respectively; showing three years of retardation, ..."

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