a.

1. 藍色的；天藍色的；青色的
   The sky was bright blue.

   天空一片蔚藍。

2. 【口】沮喪的，憂鬱的[F]；（臉色）發青的
   Cathy felt blue all day.

   凱西整天沮喪著。

3. 【口】猥褻的；下流的；色情的
   a blue joke

   下流的玩笑

n.

1. 藍色；天藍色[U][C]
   She was dressed in blue.

   她穿著藍色衣服。

2. 藍色顏料；藍色染料[U][C]
3. 【英】（常大寫）牛津（或劍橋）大學校隊運動員[C]
4. （源自美國黑人的）布魯斯樂曲，藍調[P]
   He used to like the blues very much.

   他過去非常喜愛布魯斯樂曲。

5. 【口】沮喪，憂鬱[the P]
   Tom was down with the blues.

   湯姆因沮喪而消沉。

6. 【澳】【俚】打鬥[C]
7. 晴空；大海[the S]

vt.

1. 使成藍色

adj.

1. of a colour intermediate between green and violet, as of the sky or sea on a sunny day.
   ▸(of a cat, fox, or rabbit) having fur of a smoky grey colour.
2. informal melancholy, sad, or depressed.
3. informal (of a film, joke, or story) with sexual or pornographic content.
4. Brit. informal politically conservative.
5. (of a ski run) of the second-lowest level of difficulty.

n.

1. blue colour, pigment, or material.
   ▸ (the blue) literary the sky or sea, or the unknown.
   ▸another term for bluing.
2. Brit. a person who has represented Cambridge University or Oxford University in a particular sport in a match between the two universities.
3. used in names of small butterflies with predominantly blue wings. [Polyommatus icarus (common blue) and related species.]
4. Austral./NZ informal a nickname for a red-headed person.
5. Austral./NZ informal an argument or fight.

v.

1. make or become blue.
2. chiefly historical wash (white clothes) with bluing.

v.