a.

1. 長的；遠的
   The railway is 1000 miles long.

   這條鐵路長一千英里。

2. 長久的
   She was abroad for a long time.

   她在國外待了很久。

3. 冗長的；過久的
   He gave a long, tiring report.

   他的報告冗長，令人厭倦。

4. （記憶力）能記得久遠的
   She had a long memory.

   她記性很好。

5. 希望渺茫的
6. 【語】長音的

ad.

1. 長久地
   You can keep my book as long as you like.

   我的書你要借多久都隨你的便。

2. 始終
   She worked all day long.

   她工作了一整天。

n.

1. 長時間；長時期[U]
   I am not going away for long.

   我離開的時間不會長。

2. 【語】長音節[C]
3. 長褲[P]
4. 【商】買空的人

vi.

1. 渴望[+to-v][（+for/after）]
   He longs for/after fame.

   他渴望成名。

   She longed to return home.

   她極想回家。

   She longed for her husband to return home.

   她渴望丈夫早日歸來。

adj.

1. of a great distance or duration.
   ▸of a specified distance or duration.
   ▸(of a ball in sport) travelling a great distance, or further than expected.
2. relatively great in extent.
   ▸having a specified extent.
3. Phonetics  (of a vowel) categorized as long with regard to quality and length (e.g. in standard British English the vowel /uː/ in food).
   ▸Prosody  (of a vowel or syllable) having the greater of the two recognized durations.
4. (of odds or a chance) reflecting or representing a low level of probability.
5. Finance  (of shares or other assets) bought in advance, with the expectation of a rise in price.
   ▸(of a security) maturing at a distant date.
6. (of a drink) large, refreshing, and containing little or no alcohol.
7. (long on) informal well supplied with.

n.

1. a long time.
2. a long sound, vowel, or syllable.
3. (longs) Finance  long securities or assets.

adv.

1. for a long time.
   ▸at a distant time:

   long ago.
   ▸throughout a specified period of time:

   all day long.
2. (with reference to the ball in sport) at, to, or over a great distance.

v.