AMPLIFIER Meaning of AMPLIFIER in English am ‧ pli ‧ fi ‧ er /ˈæmpləfaɪə, ˈæmplɪfaɪə $ -faɪər/ BrE AmE noun [countable]a piece of electrical equipment that makes sound louder SYN amp Longman Dictionary of Contemporary English. Longman - Словарь современного английского языка. 2012