1 wealth, riches, money, fortune, valuables, cash, cache, hoard:
The existence of the treasure came to light only last week.
2 pride (and joy), delight, joy, darling, ideal, apple of (one's) eye, Colloq jewel, gem, prize, find, catch:
Kathy is a treasure and I don't know what we did before we hired her.
3 hold dear, cherish, value, prize, esteem, rate or value highly:
We treasure the signed letter that Churchill wrote to my father. I treasure every moment we can spend together.