From WordNet (r) 3.0 (2006):
gear
n 1: a toothed wheel that engages another toothed mechanism in
order to change the speed or direction of transmitted
motion [syn: gear, gear wheel, geared wheel,
cogwheel]
2: wheelwork consisting of a connected set of rotating gears by
which force is transmitted or motion or torque is changed;
"the fool got his tie caught in the geartrain" [syn:
gearing, gear, geartrain, power train, train]
3: a mechanism for transmitting motion for some specific purpose
(as the steering gear of a vehicle) [syn: gear, gear
mechanism]
4: equipment consisting of miscellaneous articles needed for a
particular operation or sport etc. [syn: gear,
paraphernalia, appurtenance]
v 1: set the level or character of; "She pitched her speech to
the teenagers in the audience" [syn: gear, pitch]