retard UK /ɹɪˈtɑːd/US /ɹɪˈtɑɹd/verb 5noun 4forms 5 verb5 •To keep delaying; to continue to hinder; to prevent from progressing. •To decelerate; to slow down.70, 60, 50, 40, 30, 20, retard, retard... — 2019 •To put off; to postpone. •(no longer used) To stay back.Some years it [The River Nile] hath also retarded, and come far later than usually it was expected — 1650 •(no longer used) To be slow or dilatory to perform (something). noun4 •A retardation; a delay. •(informal, offensive) A person or being who is extremely stupid or slow to learn.College freshman Scott Damerow set a new world record by using his head to bust 142 eggs and he now officially holds a place in the Guinness Book of Fucking Retards. — 2013 •(offensive, old-fashioned) A person with mental retardation.The retard in our class needs special help. •A slowing down of the tempo; a ritardando. formsretarded · retarding · retardeth · retards · retardest