UNDERPINNING Meaning of UNDERPINNING in English underpinning noun BrE AmE ˌʌnd ə ˈpɪn ɪŋ ˈ••ˌ•• AmE \ - ə r-▷ underpinning|s z Longman Pronunciation English Dictionary. Английский словарь произношений Longman. 2012