LUKEWARM Meaning of LUKEWARM in English lukewarm BrE AmE ˌluːk ˈwɔːm ◂ ˈ•• AmE \ -ˈwɔːrm▷ lukewarm|ly li▷ lukewarm|ness nəs nɪs Longman Pronunciation English Dictionary. Английский словарь произношений Longman. 2012