pick a lock
To open a lock by manipulating it with tools other than a key. It's very handy having someone who can pick a lock on the team. He picked the lock on his cell using nothing more than a paperclip.
pick a lock
to open a lock without using a key. The robber picked the lock with a nail file. The thief picked the lock on the safe and stole the money.
pick a ˈlock
open a lock without a key, using something such as a piece of wire: I can’t find my front door key. I don’t suppose you know how to pick a lock, do you?