ad.

1. 向下；向楼下
   A cup fell down to the ground.

   一个杯子掉到地上。

2. 在下面
   Down in the valley the fog still lingers.

   下面山谷里仍然雾气蒙蒙。

3. （坐）下，（躺）下；（咽）下
   The child could not get the pill down.

   孩子吞不下药片。

4. 向南方；在南方
   They go down to Florida every winter.

   他们每年冬天南下去佛罗里达。

5. 去市中心，去商业区
6. （记）下，（抄）下
7. （物价、地位等）下降；（境况）变差
   Prices have gone down.

   物价下跌了。

8. （程度、数量等）减少，减弱
   The train is slowing down.

   火车正在减速。

9. 从早期起，从祖先传下
10. 立即付现
    You can pay $10 down and the rest later.

    你可现在付十美元，其余的以后再付。

11. 彻底地，完全

a.[Z]

1. 情绪低落，消沉[F]
   I've been feeling down since I lost my job.

   自从失去工作后，我的情绪一直处于低潮。

   Dick is feeling a bit down today.

   迪克今天有点情绪低落。

2. 下行的；向下的[B]
   The down escalator is not running today.

   今天下行的电梯不开。

3. 落后（于对手）的[F]
4. 【口】已完成的[F]
5. （电脑）不在工作的[F]
6. （分期付款的）第一期的
   He made a down payment of $100,000 for the house.

   他买这房子第一期付款十万美元。

prep.

1. 往……下方；在……下方
   Their house is half-way down the hill.

   他们的房子坐落在半山腰。

2. 在……尽头；沿着
   Walk directly down the road and you'll get to the square.

   沿这条路一直走，你能到广场。

3. 往……的下游；在……的下游
   They floated down the river.

   他们沿河向下游漂去。

4. 【英】【口】到，去

vt.

1. 击倒；【美】打败
   He downed his opponent in the first round.

   他在第一个回合中击倒对手。

2. 喝下，吞下
   He downed the medicine at one swallow.

   他一口便把药全吞下了。

n.[C]

1. 倒霉事；失败
   He had his ups and downs.

   他有过得意之时，也有过倒霉之日。

2. 下降；萧条
   The business cycle experienced a sudden down.

   商业周期经历突然的萧条。

3. 【口】怨恨；厌恶
   They have a down on Helen.

   他们怨恨海伦。

n.

1. 绒毛；柔毛；羽绒[U]

n.

1. 【英】有草丘陵地[P]

adv.

1. towards or in a lower place or position.
   ▸to or at a place perceived as lower.
   ▸away from the north.
   ▸Brit. away from the capital or major city.
   ▸Brit. away from a university, especially Oxford or Cambridge.
2. to or at a lower level or value.
   ▸to a smaller amount or size, or a simpler or more basic state.
   ▸from an earlier to a later point in time or order.
3. in or into a weaker or worse position, mood, or condition.
   ▸(of a computer system) out of action.
4. so as to lie flush or flat.
5. in or into writing.
   ▸on or on to a list or record.
6. (with reference to partial payment of a sum of money) made initially or on the spot.
7. (of sailing) with the current or the wind.
   ▸(of a ship's helm) moved round to leeward.
8. American Football  (of the ball or a player in possession) not in play.

prep.

1. from a higher to a lower point of.
2. at a point further along the course of.
   ▸along the course or extent of.
3. throughout (a period of time).
4. informal at or to (a place).

adj.

1. directed or moving towards a lower place or position.
   ▸denoting trains travelling away from the main terminus.
2. unhappy.
3. (of a computer system) out of action.
4. US black slang supporting or going along with.
   ▸following the latest fashion.
5. Physics  denoting a flavour of quark having a charge of -¹⁄₃.

v.

1. knock or bring to the ground.
2. consume (a drink).
3. (of a golfer) sink (a putt).

n.

1. (downs) informal unwelcome events.
2. informal a period of unhappiness.
3. American Football  a chance for a team to advance the ball, ending when the ball carrier is tackled or the ball becomes out of play.

n.

1. soft, fine feathers forming the covering of a young bird or an insulating layer below the contour feathers of an adult bird, used for stuffing cushions and quilts.
2. fine, soft hair on a person's skin.
   ▸short, soft hairs on leaves, fruit, or seeds.

n.