Definitions for "Shear line"
n. a location in a cylinder at which specific tumbler surfaces must be aligned, removing obstruction(s) which prevented the plug from moving
The dividing line between the plug and the shell (the height to which the tops of the lower pins must be raised to open the lock).
The interface between the plug and shell in a cylinder that is normally obstructed by the pin tumblers. The pins must be raised to the shear line by the correct key to allow the plug/key to turn.
A line of maximum horizontal wind shear. A narrow zone across which there is an abrupt change in the horizontal wind component parallel to it.
In meteorology, a line or narrow zone across which there is an abrupt change in the horizontal wind component parallel to this line; a line of maximum horizontal wind shear.