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WordNet-Online
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Noun retardation has 5 senses
- deceleration, slowing, retardation - a decrease in speed; "the deceleration of the arms race"
--1 is a kind of speed, swiftness, fastness
- retardation - the extent to which something is delayed or held back
--2 is a kind of delay, hold, time lag, postponement, wait
- retardant, retardent, retardation - any agent that retards or delays or hinders; "flame-retardant"
--3 is a kind of agent
- retardation, mental retardation, backwardness, slowness, subnormality - lack of normal development of intellectual capacities
--4 is a kind of stupidity
--4 has particulars:
- slowdown, lag, retardation - the act of slowing down or falling behind
--5 is a kind of delay, holdup
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