n.[C]

1. 气球，氢气球
2. （用作玩具的）气球
   The girl was startled when the balloon exploded.

   这女孩在气球爆炸时吃了一惊。

3. （漫画中圈出人物对白的）气球形圆圈
4. 气球形物；球形短颈玻璃容器

vi.

1. 像气球般鼓起（或膨胀）[（+out/up）]
2. 乘气球上升；乘气球飞行
3. 激增
   Trade deficits have ballooned.

   贸易逆差急速增大。

vt.

1. 使像气球般鼓起（或膨胀）
   He balloons his cheeks when he is hesitant.

   他迟疑不决时会鼓起双颊。

2. 使激增

a.

1. 气球状的；像气球般鼓起的

n.

1. a small rubber sac which is inflated and used as a child's toy or a decoration.
2. a large bag filled with hot air or gas to make it rise in the air, typically having a basket for passengers.
3. a rounded outline in which the words or thoughts of characters in a comic strip or cartoon are written.
4. a large rounded drinking glass, used especially for brandy.
5. Scottish informal a stupid person.

v.

1. swell out in a spherical shape.
   ▸increase rapidly.
2. travel by hot-air balloon.
3. Brit. (with reference to a ball) lob or be lobbed high in the air.