hearing-ear dog

American

[heer-ing-eer dawg] / ˈhɪər ɪŋˈɪər ˌdɔg /

noun

a dog that has been trained to alert a person who is hard of hearing to important sounds, as a telephone ringing or dangerous noises.

First recorded in 1975–80; on the model of Seeing Eye dog

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Definitions and idiom definitions from Dictionary.com Unabridged, based on the Random House Unabridged Dictionary, © Random House, Inc. 2023