ISOGLOSS Meaning of ISOGLOSS in English isogloss BrE AmE ˈaɪs ə ʊ ɡlɒs AmE \ -ə ɡlɑːs -ɡlɔːs ▷ isogloss|es ɪz əz Longman Pronunciation English Dictionary. Английский словарь произношений Longman. 2012