Retardation is the act or result of delaying the extent to which anything is retarded or delayed that which retards or delays. Retardation or retarded or similar may refer to: retardation or retarded or retired or similar may refer to reparation.
See also: Retarder, Retard (pejorative), Retarder (chemistry), Retarder (railroad), Acrylic retarder, and Intellectual disability.