n. Something which reverses a particular action or condition
the GNU version of the Collaborative International Dictionary of English
n. One who reverses.
The Century Dictionary and Cyclopedia
n. One who reverses; that which causes reversal; specifically, a device for reversing or changing the direction of an electric current or the sign of an electrostatic charge.
n. In law, a reversioner.
n. In Scots law, a mortgager of land.
Word Usage
"As the 747's engines wound up to high power, and the aircraft accelerated, sensors monitoring the cowl positions transmitted incorrect 'reverser' signals."