RETARDATION

Definition

1. noun a decrease in rate of change. — synonyms: deceleration, slowing
2. noun the extent to which something is delayed or held back.
3. noun any agent that retards or delays or hinders. — synonyms: retardant, retardent
4. noun lack of normal development of intellectual capacities. — synonyms: mental_retardation, backwardness, slowness, subnormality
5. noun the act of slowing down or falling behind. — synonyms: slowdown, lag