noun
a dog trained to make a deaf person (= person who cannot hear well) aware of sounds such as the ringing of a telephone or a doorbell
noun
a dog trained to make a deaf person (= person who cannot hear well) aware of sounds such as the ringing of a telephone or a doorbell
Oxford Advanced Learner's English Dictionary. Оксфордский английский словарь для изучающик язык на продвинутом уровне. 2005