Meaning of “amplify” in the English Dictionary

"amplify" in British English

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amplifyverb [ T ]

uk /ˈæm.plɪ.faɪ/ us /ˈæm.plə.faɪ/

(Definition of “amplify” from the Cambridge Advanced Learner’s Dictionary & Thesaurus © Cambridge University Press)

"amplify" in American English

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amplifyverb [ T ]

us /ˈæm·pləˌfɑɪ/

to increase the strength of a sound; make louder:

Electric guitars are amplified through loudspeakers.

To amplify is also to add to the information given in something:

This study amplifies earlier research.
amplification
noun [ C/U ] us /ˌæm·plə·fɪˈkeɪ·ʃən/

[ U ] sound amplification

(Definition of “amplify” from the Cambridge Academic Content Dictionary © Cambridge University Press)