UNDERFLOOR Meaning of UNDERFLOOR in English underfloor BrE AmE ˌʌnd ə ˈflɔː ◂ AmE \ - ə r ˈflɔːr ◂ -ˈfloʊr ▶ ˌ underfloor ˈ heating BrE AmE Longman Pronunciation English Dictionary. Английский словарь произношений Longman. 2012