THUMB Meaning of THUMB in English thumb BrE AmE θʌm▷ thumbed θʌmd▷ thumbing ˈθʌm ɪŋ▷ thumbs θʌmz▶ ˌ thumbs ˈ down BrE AmE▶ ˌ thumbs ˈ up BrE AmE Longman Pronunciation English Dictionary. Английский словарь произношений Longman. 2012