Definitions

1. verb

to become or make louder

“The music began to louden as the band started playing.”

2. verb

to make something more intense or severe

“The doctor warned that the disease could louden the patient’s condition.”

3. verb

to become or make more intense or severe

“The weather forecast predicted that the storm would louden throughout the night.”

4. verb

to become or make noisier

“The crowd began to louden as the news of the winner spread.”