Reverse and Replace

reverse

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

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

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.

Webster's Revised Unabridged Dictionary

reverse is an informal name for a reverse repurchase agreement.

replace

Substitute a person or thing for (another that is broken or inefficient or lost or no longer working or yielding what is expected. )
- usage: "He replaced the old razor blade"; "We need to replace the secretary that left a month ago"; "the insurance will replace the lost income"; "This antique vase can never be replaced"
Take the place or move into the position of.
- usage: "Smith replaced Miller as CEO after Miller left"; "the computer has supplanted the slide rule"; "Mary replaced Susan as the team's captain and the highest-ranked player in the school"
- synonyms: supplant, supersede, supervene upon, supercede
Put something back where it belongs.
- usage: "replace the book on the shelf after you have finished reading it"; "please put the clean dishes back in the cabinet when you have washed them"
- synonyms: put back
Put in the place of another; switch seemingly equivalent items.
- usage: "the con artist replaced the original with a fake Rembrandt"; "substitute regular milk with fat-free milk"; "synonyms can be interchanged without a changing the context's meaning"
- synonyms: substitute, interchange, exchange

(v.t.) To put in a new or different place.
(v.t.) To place again; to restore to a former place, position, condition or the like.
(v.t.) To take the place of; to supply the want of; to fulfull the end or office of.
(v.t.) To supply or substitute an equivalent for; as, to replace a lost document.
(v.t.) To refund; to repay; to restore; as, to replace a sum of money borrowed.

Webster's Revised Unabridged Dictionary