a.

1. 快的；迅速的；速度快的
   He is a fast reader.

   他读书速度很快。

2. 完成得快的
   He did a fast job.

   他很快就干完了。

3. 牢的；紧的；稳固的
   He kept a fast hold on the rope.

   他紧紧抓牢绳子。

4. （钟、表）偏快的，快……（时间）的[F]
   My watch is three minutes fast.

   我的表快三分钟。

5. 【摄】（胶片）易于迅速曝光的；（快门）快速的
6. 允许（或易于）快速行进的[B]
   A fast highway is being built.

   一条高速公路正在修建。

7. 【旧】放荡的
   He led a fast life.

   他过着放荡的生活。

8. 不褪色的
   They developed a fast dye.

   他们研制了一种不褪色的染料。

9. 可靠的；忠实的
   They are fast friends.

   他们是挚友。

ad.

1. 快，迅速
   Don't drive so fast.

   别开得这么快。

2. 紧紧地，牢固地
   Hold fast to this rope, and I will pull you up.

   抓紧绳子，我把你拉上来。

3. 快于标准时间
4. 【旧】靠近着，接近着

vi.

1. 禁食；斋戒

n.

1. 禁食；斋戒[U]

adj.

1. moving or capable of moving at high speed.
   ▸taking place or acting rapidly.
2. (of a clock or watch) showing a time ahead of the correct time.
3. firmly fixed or attached.
   ▸(of friends) close and loyal.
   ▸(of a dye) not fading in light or when washed.
4. Photography  needing only a short exposure.
5. involving or engaging in exciting or shocking activities.

adv.

1. at high speed.
   ▸within a short time.
2. so as to be firmly fixed.
3. so as to be hard to wake:
   fast asleep.

v.

n.