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audio (EN)
noun, adjective

noun “audio”

singular audio, plural audios or uncountable
  1. sound or a signal that can be heard
    The movie's visuals were stunning, but the audio was too low to hear clearly.
  2. a recording of sound
    I downloaded the audio of the lecture to listen to it on my way to work.

adjective “audio”

base form audio, non-gradable
  1. related to sounds
    She prefers audio books to printed ones because she enjoys listening to stories.