definition of
retard

[1] #1 retard v. cause to move more slowly or operate at a slower rate; "This drug will retard your heart rate". wn

[2] #2 retard n. [idiot, imbecile, cretin, moron, changeling, half-wit] a person of subnormal intelligence. wn

[3] #3 retard v. be delayed. wn

[4] #4 retard v. [check, delay] slow the growth or development of; "The brain damage will retard the child's language development". wn

[5] #5 retard v. [decelerate, slow, slow down, slow up] lose velocity; move more slowly; "The car decelerated". wn