Meaning of AMPLIFIER in English

AMPLIFIER

/ ˈæmplɪfaɪə(r); NAmE / (also informal amp ) noun

an electrical device or piece of equipment that makes sounds or radio signals louder :

a 25 watt amplifier

Oxford Advanced Learner's English Dictionary.      Оксфордский английский словарь для изучающик язык на продвинутом уровне.