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1. Treasure found hidden.
2. Law Silver or gold in the form of bullion, plate, or money that is found hidden and has no known owner.
3. A discovery of great value.

[Anglo-Norman tresor trove : Old French tresor, treasure; see treasure + Old French trove, past participle of trover, to find; see trover.]
American Heritage® Dictionary of the English Language, Fifth Edition. Copyright © 2016 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.


(in Britain) n
1. (Law) law valuable articles, such as coins, bullion, etc, found hidden in the earth or elsewhere and of unknown ownership. Such articles become the property of the Crown, which compensates the finder if the treasure is declared. In 1996 treasure was defined as any item over 300 years old and containing more than 5% precious metal
2. anything similarly discovered that is of value
[C16: from Anglo-French tresor trové treasure found, from Old French tresor treasure + trover to find]
Collins English Dictionary – Complete and Unabridged, 12th Edition 2014 © HarperCollins Publishers 1991, 1994, 1998, 2000, 2003, 2006, 2007, 2009, 2011, 2014


1. anything valuable that one finds.
2. money, bullion, or the like, of unknown ownership, found hidden in the earth or elsewhere: considered the property of the finder.
[1300–50; Middle English < Anglo-French tresor trové found treasure. See treasure, trover]
Random House Kernerman Webster's College Dictionary, © 2010 K Dictionaries Ltd. Copyright 2005, 1997, 1991 by Random House, Inc. All rights reserved.
References in classic literature ?
She had been away for a week, visiting cousins in Markdale, and she had come home with a new treasure-trove of stories, most of which she had heard from the old sailors of Markdale Harbour.
You are a solitary boy while all this is taking place, for two boys together cannot adventure far upon the Round Pond, and though you may talk to yourself throughout the voyage, giving orders and executing them with dispatch, you know not, when it is time to go home, where you have been or what swelled your sails; your treasure-trove is all locked away in your hold, so to speak, which will be opened, perhaps, by another little boy many years afterward.
He made another discovery of treasure-trove in the library.
What a treasure-trove to these venerable quidnuncs, could they have guessed the secret which Hepzibah and Clifford were carrying along with them!