n.

1. 锁[C]
   I left the key in the lock.

   我把钥匙留在锁上，忘了取下来。

2. （运河等的）船闸，水闸[C]
   The lock keeper closed the lock gate.

   船闸管理员关上了闸门。

3. （摔跤中的）抱，夹[C]
4. 【军】枪机[C]
5. 止动器；制轮楔[C]
6. （交通）堵塞[C]
7. （机器）关闭的状态[U]

vt.

1. 锁，锁上[（+up）]
   See that the door is locked before you go to bed.

   睡觉前切记把门锁上。

2. 把……锁藏起来；[O][（+up）]
   Where's the fellow now, locked up?

   那家伙现在在哪里，关进监狱了？

3. 使固定；使紧密衔接[H]
4. 紧抱住，挽住；（格斗时）揪扭
   He locked his arm in hers.

   他挽着她的手臂。

5. 卡住；塞住；煞住
   The brakes locked the wheels.

   刹车器将车轮刹住。

vi.

1. 锁住；锁得上
   The door won't lock.

   这扇门锁不上。

2. （齿轮等）卡住，塞住
   The bumpers of the two cars locked.

   那两辆汽车的保险杠互相卡住了。

3. （船）过闸
   Our ship locked into the canal.

   我们的船过闸驶入运河。

4. 紧闭

n.[C]

1. 一绺头发
2. 头发[P]

n.

1. a mechanism for keeping a door, lid, or container fastened, typically operated by a key.
   ▸a similar device used to prevent the operation of a vehicle or other machine.
2. a short section of a canal or river with gates and sluices at each end which can be opened or closed to change the water level, used for raising and lowering boats.
3. (also full lock) the maximum extent that the front wheels of a vehicle can be turned.
4. (in wrestling and martial arts) a hold that prevents an opponent from moving a limb.
5. (also lock forward) Rugby  a player in the second row of a scrum.
6. (a lock) N. Amer. informal a certainty.
7. archaic a mechanism for exploding the charge of a gun.

v.

1. fasten or be fastened with a lock.
   ▸enclose or secure by locking a door.
   ▸ (lock someone up/away) imprison someone.
   ▸ (lock someone out) exclude someone.
2. make or become rigidly fixed or immovable.
   ▸ (lock someone/thing in/into) engage or entangle someone or something in (a struggle or competitive situation).
   ▸ (lock on to) locate (a target) by radar or similar means and then track.
3. go through a lock on a canal.

n.

1. a piece of a person's hair that coils or hangs together.
   ▸ (locks) literary a person's hair.
2. a tuft of wool or cotton.