Diminution de vitesse, d'activité.
ETYM Latin retardatio: cf. French retardation.
Lack of normal development of intellectual capacities; SYN. mental retardation, backwardness, slowness, subnormality.
1. The act of slowing down or falling behind; SYN. lag, retardation. slow-down
2. When people or things do something more slowly, a slowdown occurs.