Chatur Ramalingam aka
'Silencer' : Sir: Machines are
any combination of bodies so
connected that their relative
motions are constrained, and by
which means force and motion
may be transmitted and
modified, as a screw and its
nut, or a lever arranged to turn
about a fulcrum or a pulley
about its pivot, et cetera;
especially, a construction, more
or less complex, consisting of a
combination of moving parts or
simple mechanical elements, as
wheels, levers, cams et cetera.