Meaning of AMPLIFIER in English

AMPLIFIER

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.