a small bag made of very thin rubber that becomes larger and rounder when you fill it with air or gas. Balloons are brightly coloured and used as decorations or toys. 氣球 to blow up/burst/pop a balloon 吹起氣球；使氣球爆裂 My balloon has burst! 我的氣球爆了！ A thousand balloons were released to mark the event. 一千個氣球被放飛來紀念這一事件。 They tied the balloons to the back of the car. 他們將氣球系在車後。 helium balloons for the children's party 兒童聚會用的氦氣球
Oxford Collocations Dictionaryadjective- helium
- water
- colourful/colorful
- …
- blow up
- inflate
- burst
- …
- burst
- pop
- (also hot-air balloon)
a large balloon made of strong material that is filled with hot air or gas to make it rise in the air, usually carrying a basket for passengers 熱氣球 
We went up in a balloon. 我們乘着氣球向上升。 She crossed the Atlantic in a hot-air balloon. 她乘熱氣球穿越大西洋。
Oxford Collocations Dictionaryadjective- barrage
- hot-air
- weather
- …
- go up in
- launch
- release
- …
- float by
- float over
- float up
- …
- flight
- race
- in a balloon
Word Originlate 16th cent. (originally denoting a game played with a large inflated leather ball): from French ballon or Italian ballone ‘large ball’.
Idioms
go down like a lead balloon
- (informal)
to be very unsuccessful; to not be accepted by people 非常失敗；不被接受 My suggestion went down like a lead balloon. 我的建議很快就被采納了。
when the balloon goes up
- (British English, informal)
when the trouble that you are expecting begins 意料中的麻煩出現時；（不出所料）出亂子時 We have to get out of here before the balloon goes up! 我們必須在氣球升起之前離開這裏！