|a device for assisting the hearing of partially deaf people, typically consisting of a small battery-powered electronic amplifier with microphone and earphone, worn by a deaf person in or behind the ear|
|a stew of meat, vegetables, potatoes, etc.|
|a children's mummer's parade, as on the Fourth of July, with prizes for the best costumes.|
hearing aid n.
A small electronic apparatus that amplifies sound and is worn in or behind the ear to compensate for impaired hearing.