Real Dictionary

treasure
Treasures are valuable objects, especially works of art and items of historical value.
uncountable noun: Treasure is a collection of valuable old objects such as gold coins and jewels that has been hidden or lost.
verb: If you treasure something that you have, you keep it or care for it carefully because it gives you great pleasure and you think it is very special.

treasure in American English
accumulated or stored wealth, esp. in the form of money, precious metals, jewels, etc.
to store away or save up (money, valuables, etc.) as for future use; hoard
noun: wealth or riches stored or accumulated, esp. in the form of precious metals, money, jewels, or plate
transitive verb: to retain carefully or keep in store, as in the mind

treasure in British English
to prize highly as valuable, rare, or costly
noun: wealth and riches, usually hoarded, esp in the form of money, precious metals, or gems