1. the process or result of becoming louder or making something louder
Usage: informal; gerund form

1. present participle of louden; the act of making something louder or increasing in volume or intensity
Usage: informal; less common than 'making louder' or 'amplifying'

Examples

• The loudening of the music made it hard to hear the conversation.
• She adjusted the dial, loudening the volume gradually.
• The loudening storm kept everyone awake through the night.
• He noticed the loudening of traffic as rush hour approached.
• The speaker was loudening her voice to reach the back of the room.