vt. 減少；降低；使處於；把…分解
vi. 減少；縮小；歸納為
[ 過去式 reduced 過去分詞 reduced 現在分詞 reducing ].
或：
reduce [ri'dju:s; -'du:s]
vt.
減少；縮小；削減，縮減；精簡：
They have to reduce expenses this year.
他們今年必須削減開支。
降低；減輕：
She tried to reduce her weight.
她設法降低她的體重。
將…歸納；簡化：
We can reduce his speech to three sentences.
我們可以把他的講演歸納成三句話。
換算；折合：
If you reduce 3 lbs. to ounces, you have 48 ounces.
如果將3磅換算成盎司，可得48盎司。
使變為：
The heavy artillery bombardment reduced the village to ruins.
猛烈的炮火使這個村莊變成壹片廢墟。
His words reduced her to silence.
他的話使她啞口無言。
把…弄碎(或熔化等)；搗碎：
Their daily work is to reduce the rocks to dust.
他們每天的工作就是將巖石搗碎成粉末。
使降級；使降職：
He was reduced to ordinary soldier due to a serious dereliction of duty.
他因嚴重失職被降為普通士兵。
降服(使有秩序等)；攻陷(城市等)：
The teacher soon reduced the noisy class to order.
教師很快就使這個亂哄哄的班恢復了秩序。
The fortress at the entrance to the village was reduced by a sudden attack.
村口的堡壘遭到突然襲擊而被攻陷。
使處境困難(或悲慘等)；迫使，逼迫[常用被動語態]：
The bad harvests in the last few years reduced the peasants to extreme poverty.
過去幾年的莊稼歉收使農民變得極為貧困。
Poverty reduced them to begging for a living.
貧困迫使他們乞討為生。
使變弱；使變瘦；使衰退：
He is reduced to skin and bones.
他變得骨瘦如柴。
約束；限制：
Business was reduced to local buying and selling when the war broke out and international trading ceased.
戰爭爆發國際貿易停止後，商業就只限於地方性的買賣了。
數學約簡：
The last problem is to reduce an equation to its simplest form.
最後壹道題是將壹方程式化簡為最簡單形式。
使…濃縮變稠：
The last step is to add some salt and reduce the soup for three minutes.
最後壹個步驟是加些鹽然後使湯濃縮三分鐘。
(用油)調稀(或沖淡)：
We can use this special oil to reduce the thick paint to a liquid thin enough to spread easily .
我們可以使用這種特殊的油將濃油漆稀釋壹下，使它刷起來比較省力。
化學還原；分解(化合物)：
Water can be reduced to oxygen and hydrogen by electrolysis.
水通過電解可以分解為氧和氫。
外科學使…復位(或復原)：
A doctor can reduce a fracture or dislocation.
醫生能使骨折或脫臼復原。
語音學使(重讀元音)弱化：
Some English vowel sounds which are not given weight in speech become reduced to a rather formless central vowel.
英語中有些元音在講話時沒有重讀，結果成了相當不定型的中央元音了。
攝影術減低(底片的)強度
生理學使(細胞)發生減數分裂
vi.
減少；縮小；縮減；減弱
(節食)減肥：
She has been reducing for the last few weeks.
她在最近幾周壹直在節食減肥。
化學還原：
Ferrous iron reduces to ferric iron.
二價鐵能還原成三價鐵。
(液體)濃縮變稠：
The soup will reduce by adding some cooking starch.
湯中加些澱粉將變稠。
(油漆、顏料等)稀釋：
Most paints reduce with turpentine.
許多油漆可用松節油稀釋。
生物學(細胞)減數分裂
近義詞:
decrease
變形：
vt. reduced . reducing