(chiefly science fiction) A hypothetical device used to travel into the past or the future.

(historical) A small portable electro-mechanical rotor machine used to encrypt and decrypt secret messages, made famous by Germany in WWII.

(computing theory) Ellipsis of finite-state machine.. / (Marxism) The state machinery; state apparatus.

A facility that has machine tools for working with metals or other relatively hard materials, such as some polymers. Various kinds of machine shops make and repair all types of metal objects, from machine tools, dies, and molds to mass-produced parts such as screws, pistons, or gears.

(historical) Around the 19th century, a portable changing room that was rolled down a beach to the edge of the sea to allow people to paddle in the sea modestly.

(physics, engineering) A device that only requires the application of a single force to work. / Used other than figuratively or idiomatically: see simple, machine.

(computing theory) An abstract computing machine that has a finite number of possible internal states and operates on an infinite memory tape by first reading a symbol from a cell in the tape, and then, deterministically, based on that symbol and the machine’s state, writing a symbol in that cell, moving to a neighboring cell, and/or changing state.

Of a system: including both human and machine and/or their interface.

A machine, usually automatic, that washes clothes, etc.

An electrically driven fan for generating currents of air during the production of films etc.