Definition of "hearing aid" [hearing aid]

• A small electronic apparatus that amplifies sound and is worn in or behind the ear to compensate for impaired hearing. (noun)

American Heritage(R) Dictionary of the English Language, Fifth Edition. Copyright (c) 2011 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.

• "They stopped at the chapel, found the priest on duty, Father Stephen, a small, slight man with thick glasses and a hearing aid that he kept adjusting."