1. To send in the opposite direction
2. To overrule or overturn a decision

ETYM Cf. French revers. Related to Reverse.
1. A relation of direct opposition; SYN. contrary, opposite.
2. An unfortunate happening that hinders of impedes; something that is thwarting or frustrating; SYN. reversal, setback, blow.
3. The gears by which the motion of a machine can be reversed.
4. The side of a coin or medal that does not bear the principal design; SYN. verso.

ETYM Old Eng. revers, Old Fren. revers, Latin reversus, p. p. of revertere. Related to Revert.
Of the transmission gear causing backward movement in a motor vehicle.