Reverse and Transform

noun

• A relation of direct opposition.
  • usage: "we thought Sue was older than Bill but just the reverse was true"
  • synonyms: contrary, opposite
• The gears by which the motion of a machine can be reversed.
  • synonyms: reverse gear
• An unfortunate happening that hinders or impedes; something that is thwarting or frustrating.
  • synonyms: reversal, setback, blow, black eye
• The side of a coin or medal that does not bear the principal design.
  • synonyms: verso
• American football. ( a running play in which a back running in one direction hands the ball to a back running in the opposite direction)
• Turning in the opposite direction.
  • synonyms: reversion, reversal, turnabout, turnaround

verb

• Change to the contrary.
  • usage: "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"
  • synonyms: change by reversal, turn
• Turn inside out or upside down.
  • synonyms: turn back, invert
• Rule against.
  • usage: "The Republicans were overruled when the House voted on the bill"
  • synonyms: overrule, overturn, override, overthrow
• Cancel officially.
  • usage: "He revoked the ban on smoking"; "lift an embargo"; "vacate a death sentence"
  • synonyms: revoke, annul, lift, countermand, repeal, overturn, rescind, vacate
• Reverse the position, order, relation, or condition of.
  • usage: "when forming a question, invert the subject and the verb"
  • synonyms: invert

adjective

• Directed or moving toward the rear.
  • usage: "a rearward glance"; "a rearward movement"
  • synonyms: rearward
• Of the transmission gear causing backward movement in a motor vehicle.
  • usage: "in reverse gear"
• Reversed (turned backward) in order or nature or effect.
  • synonyms: inverse

• (a.) Hence, to overthrow; to subvert.
• (a.) That which appears or is presented when anything, as a lance, a line, a course of conduct, etc., is reverted or turned contrary to its natural direction.
• (a.) To turn back; to cause to face in a contrary direction; to cause to depart.
• (a.) The act of reversing; complete change; reversal; hence, total change in circumstances or character; especially, a change from better to worse; misfortune; a check or defeat; as, the enemy met with a reverse.
• (a.) That which is directly opposite or contrary to something else; a contrary; an opposite.
• (a.) The back side; as, the reverse of a drum or trench; the reverse of a medal or coin, that is, the side opposite to the obverse. See Obverse.
• (a.) To overthrow by a contrary decision; to make void; to under or annual for error; as, to reverse a judgment, sentence or decree.
• (a.) To change totally; to alter to the opposite.
• (a.) Reversed; as, a reverse shell.
• (v.i.) To return; to revert.
• (a.) To turn upside down; to invert.
• (a.) To cause to return; to recall.
• (v.i.) To become or be reversed.
• (a.) A thrust in fencing made with a backward turn of the hand; a backhanded stroke.
• (a.) Turned upside down; greatly disturbed.
• (a.) A turn or fold made in bandaging, by which the direction of the bandage is changed.
• (a.) Turned backward; having a contrary or opposite direction; hence; opposite or contrary in kind; as, the reverse order or method.

reverse is an informal name for a reverse repurchase agreement.

verb

• Subject to a mathematical transformation.
• Change or alter in form, appearance, or nature.
  • usage: "This experience transformed her completely"; "She transformed the clay into a beautiful sculpture"; "transubstantiate one element into another"
  • synonyms: transmute, transubstantiate
• Change in outward structure or looks.
  • usage: "He transformed into a monster"; "The salesman metamorphosed into an ugly beetle"
  • synonyms: transmute, metamorphose
• Change from one form or medium into another.
  • usage: "Braque translated collage into oil"
  • synonyms: translate
• Convert (one form of energy) to another.
  • usage: "transform energy to light"
• Change (a bacterial cell) into a genetically distinct cell by the introduction of DNA from another cell of the same or closely related species.
• Increase or decrease (an alternating current or voltage. ).

• (v.t.) To change, as an algebraic expression or geometrical figure, into another from without altering its value.
• (v.i.) To be changed in form; to be metamorphosed.
• (v.t.) To change into another substance; to transmute; as, the alchemists sought to transform lead into gold.
• (v.t.) To change the form of; to change in shape or appearance; to metamorphose; as, a caterpillar is ultimately transformed into a butterfly.
• (v.t.) To change in nature, disposition, heart, character or the like; to convert.

Transform is a process to change or convert. For example, a simple moving average is a filter to reduce noise; the moving average is the transform function.