Verb

(en verb)

To make tighter.

Please tighten that screw a quarter-turn.

* Fawkes

Just where I please, with tightened rein / I'll urge thee round the dusty plain.

To become tighter.

That joint is tightening as the wood dries.

(economics) To make money harder to borrow or obtain.

If the government doesn't tighten the money supply, inflation is certain to be harsh.

(economics) To raise short-term interest rates.

The Fed is expected to tighten by a quarter-point.

Verb

To bring down the size, quantity, quality, value or intensity of something; to diminish, to lower, to impair.

* to reduce weight, speed, heat, expenses, price, personnel etc.

* {{quote-magazine, date=2012-01

, author=Stephen Ledoux , title=Behaviorism at 100 , volume=100, issue=1, page=60 , magazine= citation , passage=Becoming more aware of the progress that scientists have made on behavioral fronts can reduce the risk that other natural scientists will resort to mystical agential accounts when they exceed the limits of their own disciplinary training.}}

To lose weight.

To bring to an inferior rank; to degrade, to demote.

* to reduce a sergeant to the ranks

* An ancient but reduced family. --.

* Nothing so excellent but a man may fasten upon something belonging to it, to reduce it. --.

* Having reduced their foe to misery beneath their fears. -- .

* Hester Prynne was shocked at the condition to which she found the clergyman reduced . --.

*

Neither [Jones] nor I (in 1966) could conceive of reducing our "science" to the ultimate absurdity of reading Finnish newspapers almost a century and a half old in order to establish "priority."

To humble; to conquer; to subdue; to capture.

* to reduce a province or a fort

To bring to an inferior state or condition.

* to reduce a city to ashes

(cooking) To decrease the liquid content of food by boiling much of its water off.

(chemistry) To add electrons / hydrogen or to remove oxygen.

(metallurgy) To produce metal from ore by removing nonmetallic elements in a smelter.

(mathematics) To simplify an equation or formula without changing its value.

(legal) To convert to written form (Usage note: this verb almost always take the phrase "to writing").

* It is important that all business contracts be reduced to writing.

(medicine) To perform a reduction; to restore a fracture or dislocation to the correct alignment.

(military) To reform a line or column from (a square).