Home›Browse›P›pin-tumbler lockpin-tumbler lockOur editors are putting together more complete content — check back in about 20 minutespin-tumbler lockpin-tumbler lock — nounnoun1. A lock mechanism using pins of different lengths to prevent opening without the 1.nounDefinitionA lock mechanism using pins of different lengths to prevent opening without the correct key.ExampleThe front door has a pin-tumbler lock for security.