GRIM Meaning of GRIM in English grim BrE AmE ɡrɪm▷ grimmer ˈɡrɪm ə AmE \ - ə r▷ grimmest ˈɡrɪm ɪst -əst ▶ ˌ grim ˈ reaper BrE AmE Longman Pronunciation English Dictionary. Английский словарь произношений Longman. 2012