hearing aid is a noun meaning "an electronic device that amplifies sound and is worn to compensate for poor hearing". It carries 2 recorded senses.
an electronic device that amplifies sound and is worn to compensate for poor hearing
a conical acoustic device formerly used to direct sound to the ear of a hearing-impaired person
Definitions, synonyms and semantic relations for hearing aid come from Princeton University’s WordNet. Commonness is measured against a corpus of everyday English. Full sources and licences.