1. sound that is recorded, transmitted, or reproduced
2. the sound portion of a television broadcast, movie, or other recording

1. relating to sound or hearing
2. relating to the recording, transmission, or reproduction of sound

Examples

• The audio quality of the recording was excellent.
• Please turn up the audio so we can hear better.
• The video has good picture but poor audio.
• She works as an audio engineer at the recording studio.
• The audio equipment needs to be calibrated.
• We lost the audio signal during the broadcast.
• The audio book version is very popular.