something suitable for keeping and exhibiting in a museum.
something very old-fashioned or decrepit: That car he drives is a museum piece.
Origin of museum piece
First recorded in 1900–05
Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019
British Dictionary definitions for museum piece
an object of sufficient age or interest to be kept in a museum
informal a person or thing regarded as antiquated or decrepit
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition
© William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins
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Idioms and Phrases with museum piece
An elderly or old-fashioned item or person, as in When are you going to sell that museum piece of a car? or Aunt Jane comes from another era—she's a real museum piece. This expression originated about 1900 for an article valuable enough for museum display but began to be used disparagingly from about 1915.
The American Heritage® Idioms Dictionary
Copyright © 2002, 2001, 1995 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company.