Definitions of reverse:

• noun:   (American football) a running play in which a back running in one direction hands the ball to a back running in the opposite direction
• noun:   the gears by which the motion of a machine can be reversed
• noun:   the side of a coin or medal that does not bear the principal design
• noun:   an unfortunate happening that hinders of impedes; something that is thwarting or frustrating
• noun:   a relation of direct opposition

  Example: "We thought Sue was older than Bill but just the reverse was true"

• noun:   turning in the opposite direction
• verb:   turn inside out or upside down
• verb:   change to the contrary

  Example: "The trend was reversed"

• verb:   rule against
• verb:   annul by recalling or rescinding
• adjective:   of the transmission gear causing backward movement in a motor vehicle

  Example: "In reverse gear"

• adjective:   reversed (turned backward) in order or nature or effect
• adjective:   directed or moving toward the rear