Top Definition
A form of music, or musical device, that is now considered outdated or dead. A play on the word, "tombstone".
1. "My grandpa still listens to music in his truck on an old 8-track player. That thing is such a tunestone".
2. "I saw someone selling music from the 50's on TV last night. R.I.P 50's tunestone."
by G-Laser November 14, 2013

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