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).

Verb

(en verb)

To deteriorate, to get worse, to lose strength or health, to decline in quality.

The pair loved to take pictures in the decaying hospital on forty-third street.

# (intransitive, electronics, of storage media or the data on them) To undergo , that is, gradual degradation.

# (intransitive, computing, of software) To undergo , that is, to fail to be updated in a changing environment,so as to eventually become legacy or obsolete.

# (intransitive, physics, of a satellite's orbit) To undergo prolonged reduction in altitude (above the orbited body).

2009 , Francis Lyall, Paul B. Larsen, Space Law: A Treatise , page 120:

Damaged on lift-off, Skylab was left in orbit until its orbit decayed .

(of organic material) To rot, to go bad.

The cat's body decayed rapidly.

(intransitive, transitive, physics, chemistry, of an unstable atom) To change by undergoing fission, by emitting radiation, or by capturing or losing one or more electrons.

* 2005 , Encyclopedia of Earth Science (edited by Timothy M. Kusky; ISBN 0-8160-4973-4), page 349:

Uranium decays to radium through a long series of steps with a cumulative half-life of 4.4 billion years.

(intransitive, transitive, physics, of a quantum system) To undergo , that is, to relax to a less excited state, usually by emitting a photon or phonon.

(aviation)

To cause to rot or deteriorate.

The extreme humidity decayed the wooden sculptures in the museum's collection in a matter of years.

* Shakespeare

Infirmity, that decays the wise.