1.Definition: a decrease in rate of change

Related Noun(s):deceleration

Category: General

2.Definition: any agent that retards or delays or hinders

Related Noun(s):retardant, retardent

Category: Objects

3.Definition: lack of normal development of intellectual capacities

Related Noun(s):backwardness, slowness, subnormality

Category: General

4.Definition: the act of slowing down or falling behind

Related Noun(s):lag, slowdown

Category: General

5.Definition: the extent to which something is delayed or held back

Category: General