any mechanical or electrical device that transmits or modifies energy to perform or assist in the performance of human tasks | (American football) a running play in which a back running in one direction hands the ball to a back running in the opposite direction |
a motor vehicle with four wheels; usually propelled by an internal combustion engine | turning in the opposite direction |
a device for overcoming resistance at one point by applying force at some other point | the gears by which the motion of a machine can be reversed |
a group that controls the activities of a political party | the side of a coin or medal that does not bear the principal design |
an intricate organization that accomplishes its goals efficiently | an unfortunate happening that hinders or impedes; something that is thwarting or frustrating |
an efficient person | a relation of direct opposition |