a.[Z]

1. 两倍的；加倍的
   I'll give you double pay for working overtime.

   你加班我付你双倍工钱。

2. 双的；成双的；双层的
3. 两人用的，双人的
   We reserved a double room.

   我们订了一间双人房。

4. （意义、标准等）双重的
   The date had a double significance.

   那个日子有双重意义。

5. 两面派的，表里不一的
   That man has a double tongue.

   那人说话不老实。

6. （花）重瓣的

ad.

1. 双倍地；加倍地
   Be double careful when you cross the street.

   你过街时要加倍小心。

2. 双重地
3. 双双地
   We used to ride double on Nancy's horse.

   我们过去常常两人同骑南茜的马。

n.

1. 两倍（数或量），加倍[C][U]
   His pay is the double of mine.

   他的薪水是我的两倍。

2. 酷似的人[C]
   John is the double of his father.

   约翰长得酷似他父亲。

3. 替角演员；替身[C]
   Two doubles were employed for this scene.

   拍这个场面雇用了两个替身。

4. （赛马等的）复式下注，二重彩[C]
5. （桥牌）叫加倍[C]
6. （掷标戏）双倍（掷）[C]
7. 【棒】二垒安打[C]
8. 急转弯；折回[C]
9. （旅馆的）双人房间
10. （网球等的）双打[P]

vt.

1. 使加倍；是……的两倍
   The population of Japan doubles that of Canada.

   日本的人口是加拿大的两倍。

2. 把……对折[（+back/over）]；握紧（拳头）
   He doubled his slice of bread to make a sandwich.

   他将一片面包对折做成三明治。

3. 替代……演出；兼演（两角）
4. 绕过（海岬等）航行

vi.

1. 变成两倍；增加一倍
   The child birthrate in that area has doubled.

   该地区的婴儿出生率已经增加了一倍。

2. （桥牌）叫加倍
3. 跑步
4. 往回跑；曲折迂回（+back）
   The fox doubled back to avoid capture.

   狐狸顺原路折回以避免被捕获。

5. 替代演出[（+for）]；兼演（两角）[（+as）]
   Mary, who played the part of the dancer, doubled as her mother.

   扮演舞蹈家的玛丽同时兼演她的妈妈。

6. 【棒】击出二垒安打

adj.

1. consisting of two equal, identical, or similar parts or things:
   double doors.
   ▸having two different roles or interpretations.
   ▸(of a flower) having more than one circle of petals.
   ▸(of a domino) having the same number of pips on each half.
2. having twice the usual size, quantity, or strength:
   a double brandy.
3. designed to be used by two people.
4. Music  lower in pitch by an octave.

predet.

adv.

n.

1. a thing which is twice as large as usual or is made up of two parts.
   ▸a system of betting in which the winnings from the first bet are transferred to a second.
   ▸Darts  a hit on the ring enclosed by the two outer circles of a dartboard, scoring double.
   ▸Bridge  a call that increases the penalty points for the defenders if the declarer fails to make the contract.
2. a person who looks exactly like another.
3. Brit. two sporting victories or championships in the same season, event, etc.
4. (doubles) a game involving sides made up of two players.
5. Bell-ringing  a system of change-ringing using five bells, with two pairs changing places each time.

pron.

v.

1. make or become double.
   ▸ (double up) share a room.
   ▸ (double up) use the winnings from a bet as the stake for another bet.
   ▸Bridge  call a double.
2. fold or bend over on itself.
   ▸ (double up) bend over or curl up, typically with pain or mirth.
3. (double back) go back in the direction one has come.
4. (double up as) be used in or play another, different role.
5. Music  add the same note in a higher or lower octave to (a note).
6. Snooker  pot (a ball) by making it rebound off a cushion.