sim ‧ ple ‧ ton /ˈsɪmp ə ltən/ BrE AmE noun [countable] old-fashioned
[ Word Family: noun : ↑ simplicity , ↑ simplification , ↑ simpleton ; adverb : ↑ simply , ↑ simplistically ; adjective : ↑ simple , ↑ simplistic ; verb : ↑ simplify ]
[ Date: 1600-1700 ; Origin: simple + -ton (probably as in names like Washington) ]
someone who has a very low level of intelligence