reverse

(noun) a relation of direct opposition. Synonyms: contrary, opposite. Examples: "We thought sue was older than bill but just the reverse was true."

(noun) the gears by which the motion of a machine can be reversed. Synonyms: reverse gear.

(noun) an unfortunate happening that hinders or impedes; something that is thwarting or frustrating. Synonyms: reversal, setback, blow, black eye.

(noun) the side of a coin or medal that does not bear the principal design. Synonyms: verso.

(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) turning in the opposite direction. Synonyms: reversion, reversal, turnabout, turnaround.

(verb) change to the contrary. Synonyms: change by reversal, turn. Examples: "The trend was reversed." "The tides turned against him." "Public opinion turned when it was revealed that the president had an affair with a white house intern."

(verb) turn inside out or upside down. Synonyms: turn back, invert.

(verb) rule against. Synonyms: overrule, overturn, override, overthrow. Examples: "The republicans were overruled when the house voted on the bill."

(verb) cancel officially. Synonyms: revoke, annul, lift, countermand, repeal, overturn, rescind, vacate. Examples: "He revoked the ban on smoking." "Lift an embargo." "Vacate a death sentence."

(verb) reverse the position, order, relation, or condition of. Synonyms: invert. Examples: "When forming a question, invert the subject and the verb."

(adj) directed or moving toward the rear. Synonyms: rearward. Examples: "A rearward glance." "A rearward movement."

(adj) of the transmission gear causing backward movement in a motor vehicle. Synonyms: reverse (vs. forward). Examples: "In reverse gear."

(adj) reversed (turned backward) in order or nature or effect. Synonyms: inverse.