Definitions

1. noun

A person or thing that expresses the opinions or ideas of another; a device or instrument for transmitting sound, especially a piece of tubing or a cone-shaped object used in a musical instrument.

“The politician used the journalist as a mouthpiece to express her views on the economy.”

2. verb

To use a person or thing as a mouthpiece; to express one’s opinions or ideas through someone else.

“The company mouthpieces the views of its customers in their advertisements.”