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1. To find and retrieve something. It took me a minute to fish my keys out of my bag.
2. To be completely empty of fish, as of a body of water where fishing is common. We won't catch anything here if it's already fished out.
1. Also, fish up. Discover and retrieve something from a pile or store. For example, She finally fished out the right letter from the files, or He fished up a scandal for the paper to run in the early edition. This usage likens pulling fish from the sea to finding something. [Mid-1600s]
2. Deplete the fish in a body of water by fishing, as in This stream is completely fished out.