PLAIN Meaning of PLAIN in English plain BrE AmE pleɪn (= plane) ▷ plainer ˈpleɪn ə AmE \ - ə r▷ plainest ˈpleɪn ɪst -əst ▶ ˌ plain ˈ chocolate BrE AmE▶ ˌ plain ˈ flour BrE AmE▶ ˌ plain ˈ sailing BrE AmE Longman Pronunciation English Dictionary. Английский словарь произношений Longman. 2012