American Heritage® Dictionary of the English Language, Fourth Edition
- n. A small electronic apparatus that amplifies sound and is worn in or behind the ear to compensate for impaired hearing.
- n. an electronic device that amplifies sound and is worn to compensate for poor hearing
- n. a conical acoustic device formerly used to direct sound to the ear of a hearing-impaired person
“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.”
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