Top Definition
1. Bösendorfer (L. Bösendorfer Klavierfabrik GmbH) is a piano manufacturer, a wholly owned subsidiary of the BAWAG PSK Gruppe, and is based in Vienna, Austria. Established by Ignaz Bösendorfer in 1828, it is the oldest piano manufacturer still producing its own instruments today.

2. a friend
"My Bosendorfer has a full eight octaves."

"A Bosey is a friend." - Tori Amos
by underwaterspark July 12, 2006

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