n (1)油(类)(thick liquid that will not mix with water，obtained from plants，animals and minerals)[U]：vegetable/cooking/olive/whale/tar～菜籽/烹调/橄榄/鲸鱼/煤焦油; hair～发油;O～and water won't mix.油和水不相溶合。

(2)1)石油(petroleum)[U]：There is a lot of luck in drilling for～.钻井采油很多时候要靠运气。There are four main areas of the world where deposits of～appear.世界上有四个已探明蕴藏石油的主要地区。～rig/well/field/company 石油钻塔/油井/油田/石油公司;2)由石油提炼成的各种油(substance derived from petroleum，such as substance used as fuel，as a lubricant，etc)[U](常构成合成词)：I must put some more～in the car.我的车必须再加点汽油。You should put some～on the hinges of that gate.It doesn't open easily.你应该给大门的铰链加点润滑油，它不好打开。an～-heater/-lamp/-can 油取暖器/灯/壶;

(3)油画(oil painting)[C](infml)：an exhibition of～s by Turner 特纳的油画展;

(4)油画颜料(oil colours)[pl]：a portrait in～s 油画像;

v 给(某物)加(润滑)油(lubricate，supply，cover，or polish with oil)[T+n]：The machine will work better if it's～ed.这机器加了润滑油会运转得更好。My bicycle needs～ing.我的自行车得上油了。She～ed herself with suntan lotion.她给自己涂上防晒油。

oil the wheels 用圆滑手段使事情顺利进行：He asked a friend to～the wheels so he could borrow money from the credit union.他请一个朋友帮助周旋一下以便能从信用社借钱。

→′oilcloth n油布;′oil-colour，′oil-paint 油画(颜料);′oil-field n 油田;′oil′painting n 油画;′oilskin n油布;′oily adj 油(腻)的;′oilcake n 油渣饼;′oiltanker n油轮