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.

(UK, finance) A policy whereby the state pension is increased every year to match either price inflation, earnings growth, or a third fixed rate, whichever is highest.

(transitive) To lock up; to lock in a safe place, out of view.