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1. an inability to appreciate music

2. a person who does not appreciate music or has poor taste in music
My cousin had a major case of tin ear as a kid.
by The Return of Light Joker May 06, 2010
A person with a tin ear is a hearing person who is accustomed to the sound of a deaf person's voice, and is better at understanding deaf people speak than most other hearing people.
Her brother is deaf and has speech, so she has a tin ear.
by JJKSW February 26, 2010