Definition of machine noun from the Oxford Advanced Learner's Dictionary
1(often in compounds) a piece of equipment with moving parts that is designed to do a particular job. The power used to work a machine may be electricity, steam, gas, etc. or human powerMachines have replaced human labour in many industries.to operate/run a machineHow does this machine work?a washing/sewing machinea machine for making plastic toysI left a message on her answering machine.The potatoes are planted by machine. see also voting machine2(informal) a particular machine, for example in the home, when you do not refer to it by its full nameJust put those clothes in the machine (= the washing machine).The new machines (= computers) will be shipped next month.3a group of people that control an organization or part of an organizationthe president's propaganda machineHollywood's slick public relations machine has produced a new improved model of a young movie star.4(often disapproving) a person who acts automatically, without allowing their feelings to show or to affect their workHe was the perfect fighting machine with a total disregard for his own personal safety. see also mechanical, fruit machine, slot machine, time machine
You will find other compounds ending in machine at their place in the alphabet.