1. a device or mechanism that expands or causes something to expand
Usage: technical; often used in engineering and mechanical contexts
2. in audio engineering, a device that increases the dynamic range of a signal by reducing the volume of quieter parts
Usage: technical; audio/music production

Examples

• The expandor in the engine helps distribute pressure evenly across the chamber.
• Audio engineers use an expandor to enhance the dynamic range of vocal recordings.
• The metal expandor allows the pipe to adjust to temperature changes.
• She adjusted the expandor settings to make the quiet passages more audible.
• The expandor device is essential for maintaining proper system pressure.