Main entry: retardation, lag, slowdown
Definition: the act of slowing down or falling behind
Main entry: retardation, deceleration, slowing
Definition: a decrease in rate of change
Usage: the deceleration of the arms race
Main entry: mental retardation, slowness, subnormality, retardation, backwardness
Definition: lack of normal development of intellectual capacities
Main entry: retardant, retardation, retardent
Definition: any agent that retards or delays or hinders
Usage: flame-retardant
Main entry: retardation
Definition: the extent to which something is delayed or held back