retardation

(countable, uncountable) The act of retarding or delaying; hindrance.
(countable, uncountable) The act of retarding or delaying; hindrance.
(countable, uncountable) The act of retarding or delaying; hindrance.
(countable, uncountable) The extent to which anything is retarded; the result of any retarding or delay; mental, social, or physical slowness.
(abbreviation, alt-of, countable, ellipsis, uncountable) Ellipsis of mental retardation.
(colloquial, countable, derogatory, offensive, uncountable) Extreme stupidity.
(countable, uncountable) That which retards; an obstacle; an obstruction.
(countable, uncountable) Deceleration; reduction in the magnitude of velocity.
(countable, uncountable) A suspension which resolves upwards.