Definition of preamplify in US English:

preamplify

verbpreamplifies, preamplified, preamplifying

[with object]
  • Amplify (a signal) using a preamplifier.

    ‘you have to preamplify the direct guitar signal’

Pronunciation

preamplify

/prēˈampləˌfī//priˈæmpləˌfaɪ/