(automotive, informal) locking differential

(automotive) A kind of automotive differential that provides increased traction by restricting each of the two wheels on an axle to the same rotational speed without regard to available traction or differences in resistance seen at each wheel.

The loss of one degree of freedom in the three-dimensional rotational movement of a three-gimbal mechanism, which occurs when the axes of two of the three gimbals are driven into a parallel configuration, so that the system's rotational movement becomes two-dimensional (and necessarily remains so until an appropriate force is applied); the equivalent situation in a simulation of rotational movement, when the mathematical model uses Euler angles (representing pitch, yaw and roll) or their equivalent.

Alternative form of lovelock / A padlock symbolizing two people's love for each other.

A long tuft of hair left on the crown of the head by the warriors of some Native American tribes.

A lock that closes or secures itself by means of a spring.

(firearms) A lock in which the hammer rebounds to half cock after striking the cap or primer.

To seize up because liquid has infiltrated a mechanism for compressing gasses. / To form a seal by employing a mechanism that uses hydrostatic pressure.

(mechanical engineering, usually uncountable) A condition that arises when a device which compresses gases seizes up because of the infiltration of liquid, which prevents further compression.

(machinery, especially science fiction) An induced state of suspension or inactivity.