French lock1
/ˌfrɛn(t)ʃ ˈlɒk/Now rare (historical in later use)
noun
A lock of hair worn longer than the rest and arranged so as to hang forward over one shoulder.
Origin
Early 17th century. From French + lock. Compare earlier French cut.
French lock2
/ˌfrɛn(t)ʃ ˈlɒk/noun
1 Firearms. Originally: a true flintlock, having a wholly interior mechanism, opposed to the earlier English lock, where the catch for the cock must be screwed on. Later also: any type of gun lock manufactured in France. Now chiefly historical.
2A lock (for a door, etc.) of a type manufactured in or associated with France; especially a lock with a complex tumbler mechanism, noted for its security.
Origin
Mid 17th century; earliest use found in John Winthrop (1588–1649), colonial governor. From French + lock.