1.
found object; something picked up
An object that someone has found lying on the ground or left behind. Used for items found by chance.
2.
unexpected find; windfall; lucky discovery
Something unexpectedly good that one comes across by luck. Used figuratively for bargains, surprisingly talented people, or fortunate discoveries.
Usage
Sense 1 (literal found object) is common in everyday and legal contexts. Japan has a strong culture of turning in found items, and 拾い物 is the standard term used at police boxes and lost-and-found offices.
Sense 2 (figurative windfall) is commonly used in sports, shopping, and entertainment contexts to describe surprisingly good discoveries.