The hole in a lock or in cut in the wood to allow the key through. atch A latch is spring loaded so that when it is opened it is automatically pushed back out ready to hold the door closed. It also has a bevel shape so that it can be slammed shut. A latch is normally opened with a knob or handle.
The term often used to describe the small incision made in the chest rather than the sternum (breastbone), allowing access to the heart. Freeman was the first in the area to perform keyhole procedures.