(science fiction) A device which renders a person or thing invisible.

(computer hardware) An electronic device that is outside the computer's system unit (external to the computer's enclosing case), but used by the computer to which it is connected, such as a printer or a scanner.

A contraceptive device consisting of a spiral or similar shape of plastic or metal inserted through the vagina into the uterus in order to prevent the implantation of a fertilized egg.

Any device which generates or is powered by compressed air

Any device designed for use with or relating to the lungs, such as the iron lung and medical ventilator, or any device used in the field of respiratory therapy.

(computing) Any of many hardware devices that provide input (from a user or elsewhere) to a computer.

(literature) An identifiable rule of thumb, convention, or structure that is employed in literature and storytelling.

plural of literary device

(historical) A form of lace worked with devices. / (obsolete) Anything uncommonly precise and exact.

plural of pointing device