Pin tumbler lock. A common type of pin tumbler lock, of the euro cylinder type. The pin tumbler lock (or Yale lock, after lock manufacturers Yale) is a lock mechanism that uses pins of varying lengths to prevent the lock from opening without the correct key.
noun. A person creating a diagram. A person creating a diagram. The definition of a diagram is a graph, chart, drawing or plan that explains something by showing how the parts relate to each other. An example of diagram is a chart showing how all the departments within an organization are related.
noun. 1  A diagram that exhibits a relationship, often functional, between two sets of numbers as a set of points having coordinates determined by the relationship. Also called plot 2  . A pictorial device, such as a pie chart or bar graph, used to illustrate quantitative relationships. Also called chart .